13 x 13 = 169
The prime factor of 169 is 13.
13 is the square root of 169.
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The prime factorization of 540 using exponents is: 22 x 33 x 5
7,8,8,56,9 Are you doing your homework?
The prime factorization of 252 using exponents is: 22 x 32 x 7
169 is composite because if you do (13*13) it on a calculator then you will figure out that 169 is composite.
Prime factorization of 90 = 2x3x3x5