172 is a composite number.

Factor pairs: 172 = 1 x 172, 2 x 86, or 4 x 43

Factors of 172: 1, 2, 4, 43, 86, 172

Prime factorization: 172 = 2 x 2 x 43, which can be written (2^2) x 43

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Excel file of puzzles and previous week’s factor solutions: 10 Factors 2014-07-07