Factors of 1191

The factors of 1191 are 1, 3, 397, 1191. It has 4 factors.

Factors of 1191

Pick any whole number from 1 to 10,000.

1191 = 3 \times 397

How to work it out

1
A factor of 1191 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1191 ≈ 34.51; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 4 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$1191 = 3 \times 397$
4
Add all the factors: 1 + 3 + 397 + 1191 = 1592. Without 1191 itself that is 401, so 1191 is a deficient number.

LaTeX source of the formulas on this page

\[ 1191 = 3 \times 397 \]

Factor	Pairs with	Product
1	1191	1 × 1191 = 1191
3	397	3 × 397 = 1191

What are the factors of 1191?

The factors of 1191 are 1, 3, 397, 1191. It has 4 factors.

What are the prime factors of 1191?

3, 397. As a product: 3 × 397.

How many factors does 1191 have?

1191 has 4 factors (2 factor pairs).

What is the sum of the factors of 1191?

1592.

Is 1191 a prime number?

No. It is divisible by 3, so 1191 = 3 × 397.