Q: What are the prime factors of the number 86,988,864?

 A: 2, 3, 17, 29, 919

Why are those the prime factors of the number 86,988,864?

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 86,988,864

86,988,864
Factor Arrows
243,494,432
Factor Arrows
221,747,216
Factor Arrows
210,873,608
Factor Arrows
25,436,804
Factor Arrows
22,718,402
Factor Arrows
21,359,201
Factor Arrows
3453,067
Factor Arrows
1726,651
Factor Arrows
29919

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, 17, 29, 919

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 17 x 29 x 919 = 86,988,864

This can also be written as 26 x 31 x 171 x 291 x 9191 = 86,988,864

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


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