Q: What are the prime factors of the number 18,418,624?

 A: 2, 7, 41113

Why are those the prime factors of the number 18,418,624?

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 18,418,624

18,418,624
Factor Arrows
29,209,312
Factor Arrows
24,604,656
Factor Arrows
22,302,328
Factor Arrows
21,151,164
Factor Arrows
2575,582
Factor Arrows
2287,791
Factor Arrows
741,113

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, 7, 41113

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 7 x 41,113 = 18,418,624

This can also be written as 26 x 71 x 41,1131 = 18,418,624

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


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