Factors of 637

7, 13. As a product: 7^2 × 13.

The factors of 637 are 1, 7, 13, 49, 91, 637. It has 6 factors.

Factors of 637

Pick any whole number from 1 to 10,000.

637 = 7^{2} \times 13

How to work it out

1
A factor of 637 is a whole number that divides it with nothing left over. You only need to test the numbers up to √637 ≈ 25.24; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 6 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$637 = 7^{2} \times 13$
4
Add all the factors: 1 + 7 + 13 + 49 + 91 + 637 = 798. Without 637 itself that is 161, so 637 is a deficient number.

LaTeX source of the formulas on this page

\[ 637 = 7^{2} \times 13 \]

What are the factors of 637?

The factors of 637 are 1, 7, 13, 49, 91, 637. It has 6 factors.

What are the prime factors of 637?

7, 13. As a product: $7^{2}$ × 13.

How many factors does 637 have?

637 has 6 factors (3 factor pairs).

What is the sum of the factors of 637?

798.

Is 637 a prime number?

No. It is divisible by 7, so 637 = 7 × 91.