Q: What are the prime factors of the number 657,417,472?

 A: 2, 17, 29, 5209

Why are those the prime factors of the number 657,417,472?

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 657,417,472

657,417,472
Factor Arrows
2328,708,736
Factor Arrows
2164,354,368
Factor Arrows
282,177,184
Factor Arrows
241,088,592
Factor Arrows
220,544,296
Factor Arrows
210,272,148
Factor Arrows
25,136,074
Factor Arrows
22,568,037
Factor Arrows
17151,061
Factor Arrows
295,209

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, 29, 5209

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 2 x 2 x 17 x 29 x 5,209 = 657,417,472

This can also be written as 28 x 171 x 291 x 5,2091 = 657,417,472

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


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