Factors of 39
There are 4 factors of 39 — the full list is below, with factor pairs, prime factorization, and divisibility notes.
Factors of 39
1, 3, 13, 39
Factor pairs of 39
- 1 × 39
- 3 × 13
Prime factorization of 39
39 = 3 × 13
Number facts
- 39 is a composite number.
- 39 has 4 factors.
- 39 is not a perfect square.
- The sum of all factors of 39 is 56.
Divisibility rules that apply to 39
- 39 is divisible by 3 because the sum of its digits (12) is divisible by 3.
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How the factors of 39 are calculated
To find the factors of 39, every whole number from 1 up to the square root of 39(about 6.24) is tested for even division. 39 is odd, and it divides evenly by 3, 13. Written as a product of primes, 39 = 3 × 13, which confirms every factor above is a combination of those prime building blocks.
Frequently asked questions about 39
How many factors does 39 have?
39 has 4 factors: 1, 3, 13, 39.
Is 39 a prime number?
No. 39 is composite because it has factors other than 1 and itself.
What are the factor pairs of 39?
The factor pairs of 39 are 1 × 39, 3 × 13.
What is the prime factorization of 39?
The prime factorization of 39 is 3 × 13.