Q: What are the prime factors of the number 28,577,472?

 A: 2, 3, 7, 11, 1933

Why are those the prime factors of the number 28,577,472?

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 28,577,472

28,577,472
Factor Arrows
214,288,736
Factor Arrows
27,144,368
Factor Arrows
23,572,184
Factor Arrows
21,786,092
Factor Arrows
2893,046
Factor Arrows
2446,523
Factor Arrows
3148,841
Factor Arrows
721,263
Factor Arrows
111,933

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, 7, 11, 1933

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 3 x 7 x 11 x 1,933 = 28,577,472

This can also be written as 26 x 31 x 71 x 111 x 1,9331 = 28,577,472

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


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