Divisors of the Positive Integer 15

1, 3, 5, 15

Sum of all the Divisors of 15, including itself

24

Sum of the Proper Divisors of 15

9

Properties of the number 15

The integer 15 is an odd number.
The integer 15 is a Composite number.
9 is less than 15, so 15 is a deficient number.

The number 15 as a Roman Numeral

XV

The number 15 in various Numeral Systems

Base Representation
2:1111
3:120
4:33
5:30
6:23
7:21
8:17
9:16
10:15
11:14
12:13
13:12
14:11
15:10
16:F
17:F
18:F
19:F
20:F
21:F
22:F
23:F
24:F
25:F
26:F
27:F
28:F
29:F
30:F
31:F
32:F
33:F
34:F
35:F
36:F