They are: 5*5*7 = 175
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The only name is factorization.
Not really. A factor string is a multiplication sentence. A factor tree is a way of notating the process of finding the prime factorization of a given number. End result: 4 x 9 can be a factor string for 36, but can't be a prime factorization. The prime factorization of 36 is 2 x 2 x 3 x 3.
if its a math one i say prime factorization.
When you want to find the prime factorization of a composite number.
72 36,2 18,2,2 9,2,2,2 3,3,2,2,2