Q: What are the prime factors of the number 172,304?

 A: 2, 11, 89

Why are those the prime factors of the number 172,304?

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 172,304

172,304
Factor Arrows
286,152
Factor Arrows
243,076
Factor Arrows
221,538
Factor Arrows
210,769
Factor Arrows
11979
Factor Arrows
1189

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, 11, 89

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 11 x 11 x 89 = 172,304

This can also be written as 24 x 112 x 891 = 172,304

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


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