13 and 3
The prime numbers (factors) of 39 are: 3 and 13
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The prime numbers (factors) of 39 are: 3 and 13
The prime factors of 39 are 3 and 13.
39 is not a prime number because it has four factors: 1,3,13,39 and because prime number are numbers who has 2 factors.
Factors of 39 are 1, 3, 13, 39. Whereas the prime factors of 39 are 3, 13, 39.
The factors of 15 are 1, 3, 5, and 15. The factors of 39 are 1, 3, 13, and 39. The factors they have in common are 1 and 3. Therefore, the greatest common factor is 3. You can also determine the greatest common factor from their prime factors. The prime factors of 15 are 3 and 5. The prime factors of 39 are 3 and 13. The prime factors they have in common are a single 3, so the greatest common factor is 3.