Factors of 39
The factors of 39 are 1, 3, 13, and 39. In total, 39 has 4 factors. Its prime factorization is 3 × 13, and the sum of all its factors is 56.
All factors of 39
Here are all 4 factors of 39, listed from smallest to largest.
Factor pairs of 39
These 2 pairs of whole numbers each multiply to give 39.
Prime factorization of 39
Dividing 39 by the smallest prime at each step gives its prime factorization:
The distinct prime factors of 39 are 3, 13. To factorize any other number, use the prime factorization calculator.
Factor tree of 39
A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.
Properties of 39
| Number of factors | 4 |
|---|---|
| Sum of factors | 56 |
| Sum of proper factors | 17 |
| Prime factorization | 3 × 13 |
| Prime or composite? | Composite |
| Even or odd? | Odd |
| Perfect square? | No |
| Perfect cube? | No |
| Classification | Deficient |
What makes 39 interesting
- 39 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 2 different ways.
- 39 is a deficient number: its proper factors sum to 17, which is 22 less than 39 itself.
How to find the factors of 39 yourself
Divide 39 by each whole number starting from 1. Whenever the division leaves no remainder, both the divisor and the quotient are factors. You only need to test up to √39 ≈ 6.24, because every factor above that pairs with one below it.
Reading both columns gives every factor: 1, 3, 13, 39. The factor calculator does this automatically for any number.
Related numbers
Numbers mathematically connected to 39.
Frequently asked questions about 39
What are the factors of 39?
Is 39 a prime number?
What is the prime factorization of 39?
What two numbers multiply to give 39?
What is the sum of the factors of 39?
Is 39 a perfect square?
What is the largest factor of 39 other than itself?
How many factors does 39 have?
Explore more
Try another number in the factor calculator, break 39 down further with the prime factorization calculator, or compare 39 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.