Positive Integers » 20001-30000 » 20901-21000 » 20991

Divisors of the Positive Integer 20991

1, 3, 6997, 20991

Sum of all the Divisors of 20991, including itself

27992

Sum of the Proper Divisors of 20991

7001

Properties of the number 20991

The integer 20991 is an odd number.
The integer 20991 is a Composite number.
7001 is less than 20991, so 20991 is a deficient number.

The number 20991 as a Roman Numeral

_X_XCMXCI (Roman Numerals with underscores in front have their values increased by 1,000. The underscore represents a line over the numeral, because the Romans used overlines to multiply by 1,000.)

The number 20991 in various Numeral Systems

Base Representation
2:101000111111111
3:1001210110
4:11013333
5:1132431
6:241103
7:115125
8:50777
9:31713
10:20991
11:14853
12:10193
13:9729
14:7915
15:6346
16:51FF
17:44AD
18:3AE3
19:312F
20:2C9B
21:25CC
22:1L83
23:1GFF
24:1CAF
25:18EG
26:1519
27:11LC
28:QLJ
29:ORO
30:N9L
31:LQ4
32:KFV
33:J93
34:I5D
35:H4Q
36:G73