Factors of 387

3, 43. As a product: 3^2 × 43.

The factors of 387 are 1, 3, 9, 43, 129, 387. It has 6 factors.

Factors of 387

Pick any whole number from 1 to 10,000.

387 = 3^{2} \times 43

How to work it out

1
A factor of 387 is a whole number that divides it with nothing left over. You only need to test the numbers up to √387 ≈ 19.67; 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.
$387 = 3^{2} \times 43$
4
Add all the factors: 1 + 3 + 9 + 43 + 129 + 387 = 572. Without 387 itself that is 185, so 387 is a deficient number.

LaTeX source of the formulas on this page

\[ 387 = 3^{2} \times 43 \]

What are the factors of 387?

The factors of 387 are 1, 3, 9, 43, 129, 387. It has 6 factors.

What are the prime factors of 387?

3, 43. As a product: $3^{2}$ × 43.

How many factors does 387 have?

387 has 6 factors (3 factor pairs).

What is the sum of the factors of 387?

572.

Is 387 a prime number?

No. It is divisible by 3, so 387 = 3 × 129.