Factors of 556

2, 139. As a product: 2^2 × 139.

The factors of 556 are 1, 2, 4, 139, 278, 556. It has 6 factors.

Factors of 556

Pick any whole number from 1 to 10,000.

556 = 2^{2} \times 139

How to work it out

1
A factor of 556 is a whole number that divides it with nothing left over. You only need to test the numbers up to √556 ≈ 23.58; 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.
$556 = 2^{2} \times 139$
4
Add all the factors: 1 + 2 + 4 + 139 + 278 + 556 = 980. Without 556 itself that is 424, so 556 is a deficient number.

LaTeX source of the formulas on this page

\[ 556 = 2^{2} \times 139 \]

What are the factors of 556?

The factors of 556 are 1, 2, 4, 139, 278, 556. It has 6 factors.

What are the prime factors of 556?

2, 139. As a product: $2^{2}$ × 139.

How many factors does 556 have?

556 has 6 factors (3 factor pairs).

What is the sum of the factors of 556?

980.

Is 556 a prime number?

No. It is divisible by 2, so 556 = 2 × 278.