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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.

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12y ago

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More answers

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.

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Wiki User

13y ago
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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.

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Wiki User

15y ago
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The factors of 13 are 1 and 13. For them to be common, they need to be compared to another set of factors.

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Wiki User

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

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Wiki User

9y ago
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1 and 13

1 and 31

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Wiki User

9y ago
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3, 11

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Wiki User

15y ago
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1

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Wiki User

14y ago
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Q: What are the factors of 13 and 16?
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