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The prime factorization of a number is the primes whose product gives you that number.

126/2 = 63

63/3 = 21

21/3 = 7

The bold numbers are the primes. The prime factorization is just the product of these numbers. In this case: 2 x 3 x 3 x 7.

Or simplified:

2 x 32 x 7

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Q: What is the prime factorization 126?
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