Factors of 621

3, 23. As a product: 3^3 × 23.

The factors of 621 are 1, 3, 9, 23, 27, 69, 207, 621. It has 8 factors.

Factors of 621

Pick any whole number from 1 to 10,000.

621 = 3^{3} \times 23

How to work it out

1
A factor of 621 is a whole number that divides it with nothing left over. You only need to test the numbers up to √621 ≈ 24.92; 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.
$621 = 3^{3} \times 23$
4
Add all the factors: 1 + 3 + 9 + 23 + 27 + 69 + 207 + 621 = 960. Without 621 itself that is 339, so 621 is a deficient number.

LaTeX source of the formulas on this page

\[ 621 = 3^{3} \times 23 \]

What are the factors of 621?

The factors of 621 are 1, 3, 9, 23, 27, 69, 207, 621. It has 8 factors.

What are the prime factors of 621?

3, 23. As a product: $3^{3}$ × 23.

How many factors does 621 have?

621 has 8 factors (4 factor pairs).

What is the sum of the factors of 621?

960.

Is 621 a prime number?

No. It is divisible by 3, so 621 = 3 × 207.