Factors of 1161

3, 43. As a product: 3^3 × 43.

The factors of 1161 are 1, 3, 9, 27, 43, 129, 387, 1161. It has 8 factors.

Factors of 1161

Pick any whole number from 1 to 10,000.

1161 = 3^{3} \times 43

How to work it out

1
A factor of 1161 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1161 ≈ 34.07; 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.
$1161 = 3^{3} \times 43$
4
Add all the factors: 1 + 3 + 9 + 27 + 43 + 129 + 387 + 1161 = 1760. Without 1161 itself that is 599, so 1161 is a deficient number.

LaTeX source of the formulas on this page

\[ 1161 = 3^{3} \times 43 \]

What are the factors of 1161?

The factors of 1161 are 1, 3, 9, 27, 43, 129, 387, 1161. It has 8 factors.

What are the prime factors of 1161?

3, 43. As a product: $3^{3}$ × 43.

How many factors does 1161 have?

1161 has 8 factors (4 factor pairs).

What is the sum of the factors of 1161?

1760.

Is 1161 a prime number?

No. It is divisible by 3, so 1161 = 3 × 387.