Factors of 642

All factors of 642

Here are all 8 factors of 642, listed from smallest to largest.

Factor pairs of 642

These 4 pairs of whole numbers each multiply to give 642.

Prime factorization of 642

Dividing 642 by the smallest prime at each step gives its prime factorization:

The distinct prime factors of 642 are 2, 3, 107. To factorize any other number, use the prime factorization calculator.

Factor tree of 642

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

Properties of 642

What makes 642 interesting

• 642 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 4 different ways.
• 642 is an abundant number: its proper factors sum to 654, which is 12 more than 642 itself.
• 642 has 3 distinct prime factors (2, 3, 107), which is why it has so many divisors.

How to find the factors of 642 yourself

Divide 642 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 √642 ≈ 25.34, because every factor above that pairs with one below it.

Reading both columns gives every factor: 1, 2, 3, 6, 107, 214, 321, 642. The factor calculator does this automatically for any number.