What are the factors of 13 and 16?

Answer 1

13:

14: 2, 7

15: 3, 5

16: 2, 4, 8

17:

18: 2, 3, 6, 9

19:

20: 2, 4, 5, 10

21: 3, 7

22: 2, 11

23:

24: 2, 3, 4, 6, 8, 12

25: 5

26: 2, 13

27: 3, 9

28: 2, 4, 7, 14

29:

30: 2, 3, 5, 6, 10, 15

31:

32: 2, 4, 8, 16

If we define proper factors as regular factors without one and the number itself, prime numbers do not have proper factors.

Answer 2

Proper factors are factors of the number except the number itself. So, with that said, the proper factors of 38 are 1, 2, and 19.

Answer 3

13 is a Prime number. It is only evenly divisible by itself and one.

The factors of 16 are: 1, 2, 4, 8, and 16.
The only prime factor of 16 is: 2.

Answer 4

The factors of 13 are 1 and 13. For them to be common, they need to be compared to another set of factors.

Answer 5

1, 2, 4, 8, 16, 32.

Answer 6

1 and 13

1 and 31

Answer 7

3, 11

Answer 8

1