Factors are numbers that you multiply to get another number. For example, the factors of 6 are 2 and 3 because 2 x 3 = 6.

Prime factorization is the method of finding only the prime numbers that multiply to make the input number. A prime number is a number greater than 1 that is only divisible by itself and 1. The first 9 prime numbers are; 2, 3, 5, 7, 11, 13, 17, 19.

With this calculator, you can get all the prime factors of a number that is smaller than 100000000000000. Type or paste the number to factorize in the first input field, hit "calculate", and it will return all its prime factors. It also returns the result as comma-separated-values so you can import it into a CSV spreadsheet easily.

## How to Find Prime Factors Manually

There are two popular methods for finding prime factors, the first is trial by division and the second is to create a prime factors tree.