Factors of 685

The factors of 685 are 1, 5, 137, 685. It has 4 factors.

Factors of 685

Pick any whole number from 1 to 10,000.

685 = 5 \times 137

How to work it out

1
A factor of 685 is a whole number that divides it with nothing left over. You only need to test the numbers up to √685 ≈ 26.17; 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.
$685 = 5 \times 137$
4
Add all the factors: 1 + 5 + 137 + 685 = 828. Without 685 itself that is 143, so 685 is a deficient number.

LaTeX source of the formulas on this page

\[ 685 = 5 \times 137 \]

Factor	Pairs with	Product
1	685	1 × 685 = 685
5	137	5 × 137 = 685

What are the factors of 685?

The factors of 685 are 1, 5, 137, 685. It has 4 factors.

What are the prime factors of 685?

5, 137. As a product: 5 × 137.

How many factors does 685 have?

685 has 4 factors (2 factor pairs).

What is the sum of the factors of 685?

828.

Is 685 a prime number?

No. It is divisible by 5, so 685 = 5 × 137.