Factors of 1791

3, 199. As a product: 3^2 × 199.

The factors of 1791 are 1, 3, 9, 199, 597, 1791. It has 6 factors.

Factors of 1791

Pick any whole number from 1 to 10,000.

1791 = 3^{2} \times 199

How to work it out

1
A factor of 1791 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1791 ≈ 42.32; 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.
$1791 = 3^{2} \times 199$
4
Add all the factors: 1 + 3 + 9 + 199 + 597 + 1791 = 2600. Without 1791 itself that is 809, so 1791 is a deficient number.

LaTeX source of the formulas on this page

\[ 1791 = 3^{2} \times 199 \]

What are the factors of 1791?

The factors of 1791 are 1, 3, 9, 199, 597, 1791. It has 6 factors.

What are the prime factors of 1791?

3, 199. As a product: $3^{2}$ × 199.

How many factors does 1791 have?

1791 has 6 factors (3 factor pairs).

What is the sum of the factors of 1791?

2600.

Is 1791 a prime number?

No. It is divisible by 3, so 1791 = 3 × 597.