Q: What are the prime factors of the number 57,707,520?

 A: 2, 3, 5, 13, 17

Why are those the prime factors of the number 57,707,520?

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 57,707,520

57,707,520
Factor Arrows
228,853,760
Factor Arrows
214,426,880
Factor Arrows
27,213,440
Factor Arrows
23,606,720
Factor Arrows
21,803,360
Factor Arrows
2901,680
Factor Arrows
2450,840
Factor Arrows
2225,420
Factor Arrows
2112,710
Factor Arrows
256,355
Factor Arrows
318,785
Factor Arrows
53,757
Factor Arrows
13289
Factor Arrows
1717

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, 5, 13, 17

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 2 x 2 x 3 x 5 x 13 x 17 x 17 = 57,707,520

This can also be written as 210 x 31 x 51 x 131 x 172 = 57,707,520

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


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