Factoring Calculator - Version 1.0 Factoring Calculator is a software for number conversion programmed to calculate the number of prime factors for a given number. In mathematics, factorization or factoring is the decomposition of a number into a product of other objects, or factors, which when multiplied together give the original. For small numbers you can calculate the prime factors simply. When it comes to large numbers, finding out the prime factors may be time consuming and bit complicated. To make your calculations easy, this online prime factorization calculator will help you to figure out all the prime factors in the given number by a single click.