Factors of 1089

3, 11. As a product: 3^2 × 11^2.

The factors of 1089 are 1, 3, 9, 11, 33, 99, 121, 363, 1089. It has 9 factors.

Factors of 1089

Pick any whole number from 1 to 10,000.

1089 = 3^{2} \times 11^{2}

How to work it out

1
A factor of 1089 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1089 ≈ 33.00; 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.
$1089 = 3^{2} \times 11^{2}$
4
Add all the factors: 1 + 3 + 9 + 11 + 33 + 99 + 121 + 363 + 1089 = 1729. Without 1089 itself that is 640, so 1089 is a deficient number.

LaTeX source of the formulas on this page

\[ 1089 = 3^{2} \times 11^{2} \]

What are the factors of 1089?

The factors of 1089 are 1, 3, 9, 11, 33, 99, 121, 363, 1089. It has 9 factors.

What are the prime factors of 1089?

3, 11. As a product: $3^{2}$ × $11^{2}$ .

How many factors does 1089 have?

1089 has 9 factors (5 factor pairs, one of them 33 × 33).

What is the sum of the factors of 1089?

1729.

Is 1089 a prime number?

No. It is divisible by 3, so 1089 = 3 × 363.