Factors of 77

All factors of 77

Here are all 4 factors of 77, listed from smallest to largest.

Factor pairs of 77

These 2 pairs of whole numbers each multiply to give 77.

Prime factorization of 77

Dividing 77 by the smallest prime at each step gives its prime factorization:

The distinct prime factors of 77 are 7, 11. To factorize any other number, use the prime factorization calculator.

Factor tree of 77

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

Properties of 77

What makes 77 interesting

• 77 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.
• 77 is a deficient number: its proper factors sum to 19, which is 58 less than 77 itself.

How to find the factors of 77 yourself

Divide 77 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 √77 ≈ 8.77, because every factor above that pairs with one below it.

Reading both columns gives every factor: 1, 7, 11, 77. The factor calculator does this automatically for any number.