Q: What are the prime factors of the number 161,472?

 A: 2, 3, 29

Why are those the prime factors of the number 161,472?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 161,472

161,472
Factor Arrows
280,736
Factor Arrows
240,368
Factor Arrows
220,184
Factor Arrows
210,092
Factor Arrows
25,046
Factor Arrows
22,523
Factor Arrows
3841
Factor Arrows
2929

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 29

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 29 x 29 = 161,472

This can also be written as 26 x 31 x 292 = 161,472

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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