Factors of 65

The factors of 65 are 1, 5, 13, 65. It has 4 factors.

Factors of 65

Pick any whole number from 1 to 10,000.

65 = 5 \times 13

How to work it out

1
A factor of 65 is a whole number that divides it with nothing left over. You only need to test the numbers up to √65 ≈ 8.06; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 4 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$65 = 5 \times 13$
4
Add all the factors: 1 + 5 + 13 + 65 = 84. Without 65 itself that is 19, so 65 is a deficient number.

LaTeX source of the formulas on this page

\[ 65 = 5 \times 13 \]

Factor	Pairs with	Product
1	65	1 × 65 = 65
5	13	5 × 13 = 65

What are the factors of 65?

The factors of 65 are 1, 5, 13, 65. It has 4 factors.

What are the prime factors of 65?

5, 13. As a product: 5 × 13.

How many factors does 65 have?

65 has 4 factors (2 factor pairs).

What is the sum of the factors of 65?

84.

Is 65 a prime number?

No. It is divisible by 5, so 65 = 5 × 13.