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164 = 22 × 41
2x2x41
It is: 2*2*41 = 164
1997 is already prime; no tree.
2 x 2 x 41 = 164
51 3,17
a prime factorization tree
33 11,3
350=2x5x5x7
50 25,2 5,5,2
844 422,2 211,2,2
99_11_9_3_3 so prime factorization is 11x3x3