Factors of 981

3, 109. As a product: 3^2 × 109.

The factors of 981 are 1, 3, 9, 109, 327, 981. It has 6 factors.

Factors of 981

Pick any whole number from 1 to 10,000.

981 = 3^{2} \times 109

How to work it out

1
A factor of 981 is a whole number that divides it with nothing left over. You only need to test the numbers up to √981 ≈ 31.32; 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.
$981 = 3^{2} \times 109$
4
Add all the factors: 1 + 3 + 9 + 109 + 327 + 981 = 1430. Without 981 itself that is 449, so 981 is a deficient number.

LaTeX source of the formulas on this page

\[ 981 = 3^{2} \times 109 \]

What are the factors of 981?

The factors of 981 are 1, 3, 9, 109, 327, 981. It has 6 factors.

What are the prime factors of 981?

3, 109. As a product: $3^{2}$ × 109.

How many factors does 981 have?

981 has 6 factors (3 factor pairs).

What is the sum of the factors of 981?

1430.

Is 981 a prime number?

No. It is divisible by 3, so 981 = 3 × 327.