Q: What are the prime factors of the number 40,020,864?

 A: 2, 3, 13, 8017

Why are those the prime factors of the number 40,020,864?

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 40,020,864

40,020,864
Factor Arrows
220,010,432
Factor Arrows
210,005,216
Factor Arrows
25,002,608
Factor Arrows
22,501,304
Factor Arrows
21,250,652
Factor Arrows
2625,326
Factor Arrows
2312,663
Factor Arrows
3104,221
Factor Arrows
138,017

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, 13, 8017

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 3 x 13 x 8,017 = 40,020,864

This can also be written as 27 x 31 x 131 x 8,0171 = 40,020,864

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


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