Factors of 688

2, 43. As a product: 2^4 × 43.

The factors of 688 are 1, 2, 4, 8, 16, 43, 86, 172, 344, 688. It has 10 factors.

Factors of 688

Pick any whole number from 1 to 10,000.

688 = 2^{4} \times 43

How to work it out

1
A factor of 688 is a whole number that divides it with nothing left over. You only need to test the numbers up to √688 ≈ 26.23; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 10 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$688 = 2^{4} \times 43$
4
Add all the factors: 1 + 2 + 4 + 8 + 16 + 43 + 86 + 172 + 344 + 688 = 1364. Without 688 itself that is 676, so 688 is a deficient number.

LaTeX source of the formulas on this page

\[ 688 = 2^{4} \times 43 \]

What are the factors of 688?

The factors of 688 are 1, 2, 4, 8, 16, 43, 86, 172, 344, 688. It has 10 factors.

What are the prime factors of 688?

2, 43. As a product: $2^{4}$ × 43.

How many factors does 688 have?

688 has 10 factors (5 factor pairs).

What is the sum of the factors of 688?

1364.

Is 688 a prime number?

No. It is divisible by 2, so 688 = 2 × 344.