Factors of 171

3, 19. As a product: 3^2 × 19.

The factors of 171 are 1, 3, 9, 19, 57, 171. It has 6 factors.

Factors of 171

Pick any whole number from 1 to 10,000.

171 = 3^{2} \times 19

How to work it out

1
A factor of 171 is a whole number that divides it with nothing left over. You only need to test the numbers up to √171 ≈ 13.08; 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.
$171 = 3^{2} \times 19$
4
Add all the factors: 1 + 3 + 9 + 19 + 57 + 171 = 260. Without 171 itself that is 89, so 171 is a deficient number.

LaTeX source of the formulas on this page

\[ 171 = 3^{2} \times 19 \]

What are the factors of 171?

The factors of 171 are 1, 3, 9, 19, 57, 171. It has 6 factors.

What are the prime factors of 171?

3, 19. As a product: $3^{2}$ × 19.

How many factors does 171 have?

171 has 6 factors (3 factor pairs).

What is the sum of the factors of 171?

260.

Is 171 a prime number?

No. It is divisible by 3, so 171 = 3 × 57.