# Prime Factors Calculator

Use our **prime factors calculator** to identify the prime factors and divisors of any whole number. Feel free to use this calculator to check your homework. Identifying the prime factors of a number ( or prime factorization) is the first step to determining the** least common multiple** or **greatest common factor** of two or more numbers.

You can also visually review our **Prime Factorization Table** for a list of the prime factors for all numbers between 1 and 1001.