Find the prime factorization of each of the 13 numbers.Find the factors which appear in the prime factorization of all of the numbers.Multiply them together.
13 is already prime, no factorization required.
To find the prime factorization of a number, divide the number by each prime number up to the greatest prime that will go into the number leaving no remainder.455/5=9191/7= 1313/13=1Listing each divisor as a prime factor, the prime factorization of 455 is 5 x 7 x 13.
13 is a prime, so its prime factorization is: 13
2 and 13 are its prime factors.
5 x 13
3 x 13
13 is already prime. No factorization necessary.
13 is already prime. No factorization.
13 is already prime, no tree required.
The prime factors are 2 and 13 because 2*13 = 26