The Integers 1801 to 1900

  • Count(d(N)) is the number of positive divisors of n, including 1 and n itself.
  • σ(N) is the Divisor Function. It represents the sum of all the positive divisors of n, including 1 and n itself.
  • s(N) is the Restricted Divisor Function. It represents the sum of the proper divisors of n, excluding n itself.
  • For a Prime Number, Count(d(N))=2. The only divisors for a Prime Number are 1 and itself.
  • A Deficient Number is greater than the sum of its proper divisors; that is, s(N)<n.
  • An Abundant Number is less than the sum of its proper divisors; that is, s(N)>n.
  • A Perfect Number equals the sum of its proper divisors; that is, s(N)=n.
N Divisors of N Count(d(N)) σ(N) s(N) Prime or Composite Notes
18011, 1801218021PrimeDeficient
18021, 2, 17, 34, 53, 106, 901, 1802829161114CompositeDeficient
18031, 3, 601, 180342408605CompositeDeficient
18041, 2, 4, 11, 22, 41, 44, 82, 164, 451, 902, 18041235281724CompositeDeficient
18051, 5, 19, 95, 361, 180562286481CompositeDeficient
18061, 2, 3, 6, 7, 14, 21, 42, 43, 86, 129, 258, 301, 602, 903, 18061642242418CompositeAbundant
18071, 13, 139, 180741960153CompositeDeficient
18081, 2, 4, 8, 16, 113, 226, 452, 904, 18081035341726CompositeDeficient
18091, 3, 9, 27, 67, 201, 603, 180982720911CompositeDeficient
18101, 2, 5, 10, 181, 362, 905, 1810832761466CompositeDeficient
18111, 1811218121PrimeDeficient
18121, 2, 3, 4, 6, 12, 151, 302, 453, 604, 906, 18121242562444CompositeAbundant
18131, 7, 37, 49, 259, 181362166353CompositeDeficient
18141, 2, 907, 181442724910CompositeDeficient
18151, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 18151231921377CompositeDeficient
18161, 2, 4, 8, 227, 454, 908, 1816834201604CompositeDeficient
18171, 23, 79, 181741920103CompositeDeficient
18181, 2, 3, 6, 9, 18, 101, 202, 303, 606, 909, 18181239782160CompositeAbundant
18191, 17, 107, 181941944125CompositeDeficient
18201, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 18202447042884CompositeAbundant
18211, 3, 607, 182142432611CompositeDeficient
18221, 2, 911, 182242736914CompositeDeficient
18231, 1823218241PrimeDeficient
18241, 2, 3, 4, 6, 8, 12, 16, 19, 24, 32, 38, 48, 57, 76, 96, 114, 152, 228, 304, 456, 608, 912, 18242450403216CompositeAbundant
18251, 5, 25, 73, 365, 182562294469CompositeDeficient
18261, 2, 11, 22, 83, 166, 913, 1826830241198CompositeDeficient
18271, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 18271231201293CompositeDeficient
18281, 2, 4, 457, 914, 1828632061378CompositeDeficient
18291, 31, 59, 18294192091CompositeDeficient
18301, 2, 3, 5, 6, 10, 15, 30, 61, 122, 183, 305, 366, 610, 915, 18301644642634CompositeAbundant
18311, 1831218321PrimeDeficient
18321, 2, 4, 8, 229, 458, 916, 1832834501618CompositeDeficient
18331, 3, 13, 39, 47, 141, 611, 183382688855CompositeDeficient
18341, 2, 7, 14, 131, 262, 917, 1834831681334CompositeDeficient
18351, 5, 367, 183542208373CompositeDeficient
18361, 2, 3, 4, 6, 9, 12, 17, 18, 27, 34, 36, 51, 54, 68, 102, 108, 153, 204, 306, 459, 612, 918, 18362450403204CompositeAbundant
18371, 11, 167, 183742016179CompositeDeficient
18381, 2, 919, 183842760922CompositeDeficient
18391, 3, 613, 183942456617CompositeDeficient
18401, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 18402044642624CompositeAbundant
18411, 7, 263, 184142112271CompositeDeficient
18421, 2, 3, 6, 307, 614, 921, 1842836961854CompositeAbundant
18431, 19, 97, 184341960117CompositeDeficient
18441, 2, 4, 461, 922, 1844632341390CompositeDeficient
18451, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 18451232761431CompositeDeficient
18461, 2, 13, 26, 71, 142, 923, 1846830241178CompositeDeficient
18471, 1847218481PrimeDeficient
18481, 2, 3, 4, 6, 7, 8, 11, 12, 14, 21, 22, 24, 28, 33, 42, 44, 56, 66, 77, 84, 88, 132, 154, 168, 231, 264, 308, 462, 616, 924, 18483257603912CompositeAbundant
18491, 43, 18493189344CompositeDeficient
18501, 2, 5, 10, 25, 37, 50, 74, 185, 370, 925, 18501235341684CompositeDeficient
18511, 3, 617, 185142472621CompositeDeficient
18521, 2, 4, 463, 926, 1852632481396CompositeDeficient
18531, 17, 109, 185341980127CompositeDeficient
18541, 2, 3, 6, 9, 18, 103, 206, 309, 618, 927, 18541240562202CompositeAbundant
18551, 5, 7, 35, 53, 265, 371, 185582592737CompositeDeficient
18561, 2, 4, 8, 16, 29, 32, 58, 64, 116, 232, 464, 928, 18561438101954CompositeAbundant
18571, 3, 619, 185742480623CompositeDeficient
18581, 2, 929, 185842790932CompositeDeficient
18591, 11, 13, 143, 169, 185962196337CompositeDeficient
18601, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 31, 60, 62, 93, 124, 155, 186, 310, 372, 465, 620, 930, 18602453763516CompositeAbundant
18611, 1861218621PrimeDeficient
18621, 2, 7, 14, 19, 38, 49, 98, 133, 266, 931, 18621234201558CompositeDeficient
18631, 3, 9, 23, 27, 69, 81, 207, 621, 18631029041041CompositeDeficient
18641, 2, 4, 8, 233, 466, 932, 1864835101646CompositeDeficient
18651, 5, 373, 186542244379CompositeDeficient
18661, 2, 3, 6, 311, 622, 933, 1866837441878CompositeAbundant
18671, 1867218681PrimeDeficient
18681, 2, 4, 467, 934, 1868632761408CompositeDeficient
18691, 3, 7, 21, 89, 267, 623, 1869828801011CompositeDeficient
18701, 2, 5, 10, 11, 17, 22, 34, 55, 85, 110, 170, 187, 374, 935, 18701638882018CompositeAbundant
18711, 1871218721PrimeDeficient
18721, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 36, 39, 48, 52, 72, 78, 104, 117, 144, 156, 208, 234, 312, 468, 624, 936, 18723056423770CompositeAbundant
18731, 1873218741PrimeDeficient
18741, 2, 937, 187442814940CompositeDeficient
18751, 3, 5, 15, 25, 75, 125, 375, 625, 18751031241249CompositeDeficient
18761, 2, 4, 7, 14, 28, 67, 134, 268, 469, 938, 18761238081932CompositeAbundant
18771, 1877218781PrimeDeficient
18781, 2, 3, 6, 313, 626, 939, 1878837681890CompositeAbundant
18791, 1879218801PrimeDeficient
18801, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 18801643202440CompositeAbundant
18811, 3, 9, 11, 19, 33, 57, 99, 171, 209, 627, 18811231201239CompositeDeficient
18821, 2, 941, 188242826944CompositeDeficient
18831, 7, 269, 188342160277CompositeDeficient
18841, 2, 3, 4, 6, 12, 157, 314, 471, 628, 942, 18841244242540CompositeAbundant
18851, 5, 13, 29, 65, 145, 377, 188582520635CompositeDeficient
18861, 2, 23, 41, 46, 82, 943, 1886830241138CompositeDeficient
18871, 3, 17, 37, 51, 111, 629, 188782736849CompositeDeficient
18881, 2, 4, 8, 16, 32, 59, 118, 236, 472, 944, 18881237801892CompositeAbundant
18891, 1889218901PrimeDeficient
18901, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 18903257603870CompositeAbundant
18911, 31, 61, 18914198493CompositeDeficient
18921, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 18921236961804CompositeDeficient
18931, 3, 631, 189342528635CompositeDeficient
18941, 2, 947, 189442844950CompositeDeficient
18951, 5, 379, 189542280385CompositeDeficient
18961, 2, 3, 4, 6, 8, 12, 24, 79, 158, 237, 316, 474, 632, 948, 18961648002904CompositeAbundant
18971, 7, 271, 189742176279CompositeDeficient
18981, 2, 13, 26, 73, 146, 949, 1898831081210CompositeDeficient
18991, 3, 9, 211, 633, 189962756857CompositeDeficient
19001, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 19001843402440CompositeAbundant