84
42,2
21,2,2
7,3,2,2
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Use a factor tree. 84 42,2 21,2,2 7,3,2,2
The factor tree is as follows: 114 57,2 19,3,2
119 7,17
Since 61 is already prime, a factor tree is not necessary. The prime factorization of 51 is 3 x 17, which wouldn't make much of a tree. More like a factor shrub.
84 ^ 21 4 ^ ^ 7 3 2 2 84 ^ 42 2 ^ 21 2 ^ 7 3