Factors of 381

The factors of 381 are 1, 3, 127, 381. It has 4 factors.

Factors of 381

Pick any whole number from 1 to 10,000.

381 = 3 \times 127

How to work it out

1
A factor of 381 is a whole number that divides it with nothing left over. You only need to test the numbers up to √381 ≈ 19.52; 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.
$381 = 3 \times 127$
4
Add all the factors: 1 + 3 + 127 + 381 = 512. Without 381 itself that is 131, so 381 is a deficient number.

LaTeX source of the formulas on this page

\[ 381 = 3 \times 127 \]

Factor	Pairs with	Product
1	381	1 × 381 = 381
3	127	3 × 127 = 381

What are the factors of 381?

The factors of 381 are 1, 3, 127, 381. It has 4 factors.

What are the prime factors of 381?

3, 127. As a product: 3 × 127.

How many factors does 381 have?

381 has 4 factors (2 factor pairs).

What is the sum of the factors of 381?

512.

Is 381 a prime number?

No. It is divisible by 3, so 381 = 3 × 127.