You can put this solution on YOUR website! Most people use factor trees to do this these days. That's real difficult to do in this program, so what I'm going to do is divide by the smallest numbers I know that will go evenly into 40, then the reamianders. The left column will be the prime factors.
Find the prime factorization of 40
2 * 20
2 * 10
2 * 5
5 * 1
The prime factors are 2*2*2*5 or
Happy Calculating!!!