Q: What are the prime factors of the number 22,851,720?

 A: 2, 3, 5, 2351

Why are those the prime factors of the number 22,851,720?

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 22,851,720

22,851,720
Factor Arrows
211,425,860
Factor Arrows
25,712,930
Factor Arrows
22,856,465
Factor Arrows
3952,155
Factor Arrows
3317,385
Factor Arrows
3105,795
Factor Arrows
335,265
Factor Arrows
311,755
Factor Arrows
52,351

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, 2351

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 2,351 = 22,851,720

This can also be written as 23 x 35 x 51 x 2,3511 = 22,851,720

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


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