A prime factor is a factor which is also a prime number. ... Beneath the number 56 is the number 1, 2, 4, 7, 8, 14 and 28., First, find all the factors for 42 and 56. End of image gallery.

A prime factor is a factor which is also a prime number. Remember, ... Factors of 56: 1, 2, 4, 7, 8, 14 and 28. Now you can see all of the common factors: 1, 2, 7 and 14 ...