Factors of 381

All factors of 381

Here are all 4 factors of 381, listed from smallest to largest.

Factor pairs of 381

These 2 pairs of whole numbers each multiply to give 381.

Prime factorization of 381

Dividing 381 by the smallest prime at each step gives its prime factorization:

The distinct prime factors of 381 are 3, 127. To factorize any other number, use the prime factorization calculator.

Factor tree of 381

A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.

Properties of 381

What makes 381 interesting

• 381 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 2 different ways.
• 381 is a deficient number: its proper factors sum to 131, which is 250 less than 381 itself.

How to find the factors of 381 yourself

Divide 381 by each whole number starting from 1. Whenever the division leaves no remainder, both the divisor and the quotient are factors. You only need to test up to √381 ≈ 19.52, because every factor above that pairs with one below it.

Reading both columns gives every factor: 1, 3, 127, 381. The factor calculator does this automatically for any number.