Factors of 1521

3, 13. As a product: 3^2 × 13^2.

The factors of 1521 are 1, 3, 9, 13, 39, 117, 169, 507, 1521. It has 9 factors.

Factors of 1521

Pick any whole number from 1 to 10,000.

1521 = 3^{2} \times 13^{2}

How to work it out

1
A factor of 1521 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1521 ≈ 39.00; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 9 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$1521 = 3^{2} \times 13^{2}$
4
Add all the factors: 1 + 3 + 9 + 13 + 39 + 117 + 169 + 507 + 1521 = 2379. Without 1521 itself that is 858, so 1521 is a deficient number.

LaTeX source of the formulas on this page

\[ 1521 = 3^{2} \times 13^{2} \]

What are the factors of 1521?

The factors of 1521 are 1, 3, 9, 13, 39, 117, 169, 507, 1521. It has 9 factors.

What are the prime factors of 1521?

3, 13. As a product: $3^{2}$ × $13^{2}$ .

How many factors does 1521 have?

1521 has 9 factors (5 factor pairs, one of them 39 × 39).

What is the sum of the factors of 1521?

2379.

Is 1521 a prime number?

No. It is divisible by 3, so 1521 = 3 × 507.