A Prime number can be divided evenly only by 1 or itself. And it must be a whole number greater than 1.

Prime Factorization is the process of finding all the prime factors of an integer. Here is a simple way. In the first diagram below, the prime factors of integer 891 is 3, 3, 3, 3, and 11.

How do you find the greatest common factor (GCF) among integers? And how do you find the lest common multiple (LCM) among integers? Here is a simple way. In 2nd diagram below, the greatest common factor among (1092, 588, 1596) is 2*2*3*7=84, and the lest common multiple of (1092, 588, 1596) is 2*2*3*7*13*7*19 = 145,236