165
55,3
11,5,3
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Use a factor tree to break apart numbers.ie. 12...../ \....2 6....../ \.....2 3The prime factors of 12 are 2, 2, and 3.
The prime factorization of the number at the top
Use a factor tree. 56 28,2 14,2 7,2,2,2 The largest prime factor is 7.
109 109 x 1 This is all there is to the factor tree, because 109 is a prime number. Normally, I wouldn't use 1 in a factor tree, but I do in this case to make it clear that I have done a factor tree, since 109 is only divisible by itself and 1.
726 363,2 121,3,2 11,11,3,2