Q: What are the prime factors of the number 28,888,640?

 A: 2, 5, 11, 29, 283

Why are those the prime factors of the number 28,888,640?

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 28,888,640

28,888,640
Factor Arrows
214,444,320
Factor Arrows
27,222,160
Factor Arrows
23,611,080
Factor Arrows
21,805,540
Factor Arrows
2902,770
Factor Arrows
2451,385
Factor Arrows
590,277
Factor Arrows
118,207
Factor Arrows
29283

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, 5, 11, 29, 283

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 5 x 11 x 29 x 283 = 28,888,640

This can also be written as 26 x 51 x 111 x 291 x 2831 = 28,888,640

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


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