Q: What are the prime factors of the number 172,905,232?

 A: 2, 17, 61, 613

Why are those the prime factors of the number 172,905,232?

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 172,905,232

172,905,232
Factor Arrows
286,452,616
Factor Arrows
243,226,308
Factor Arrows
221,613,154
Factor Arrows
210,806,577
Factor Arrows
17635,681
Factor Arrows
1737,393
Factor Arrows
61613

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, 17, 61, 613

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 17 x 17 x 61 x 613 = 172,905,232

This can also be written as 24 x 172 x 611 x 6131 = 172,905,232

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


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