Q: What are the prime factors of the number 628,184?

 A: 2, 17, 31, 149

Why are those the prime factors of the number 628,184?

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 628,184

628,184
Factor Arrows
2314,092
Factor Arrows
2157,046
Factor Arrows
278,523
Factor Arrows
174,619
Factor Arrows
31149

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, 31, 149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 17 x 31 x 149 = 628,184

This can also be written as 23 x 171 x 311 x 1491 = 628,184

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


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