Factors of 686

The factors of 686 are 1, 2, 7, 14, 49, 98, 343, 686. It has 8 factors.

Factors of 686

Pick any whole number from 1 to 10,000.

686 = 2 \times 7^{3}

How to work it out

1
A factor of 686 is a whole number that divides it with nothing left over. You only need to test the numbers up to √686 ≈ 26.19; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 8 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$686 = 2 \times 7^{3}$
4
Add all the factors: 1 + 2 + 7 + 14 + 49 + 98 + 343 + 686 = 1200. Without 686 itself that is 514, so 686 is a deficient number.

LaTeX source of the formulas on this page

\[ 686 = 2 \times 7^{3} \]

What are the factors of 686?

The factors of 686 are 1, 2, 7, 14, 49, 98, 343, 686. It has 8 factors.

What are the prime factors of 686?

2, 7. As a product: 2 × $7^{3}$ .

How many factors does 686 have?

686 has 8 factors (4 factor pairs).

What is the sum of the factors of 686?

1200.

Is 686 a prime number?

No. It is divisible by 2, so 686 = 2 × 343.