Q: What are the prime factors of the number 18,185,664?

 A: 2, 3, 7, 1933

Why are those the prime factors of the number 18,185,664?

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 18,185,664

18,185,664
Factor Arrows
29,092,832
Factor Arrows
24,546,416
Factor Arrows
22,273,208
Factor Arrows
21,136,604
Factor Arrows
2568,302
Factor Arrows
2284,151
Factor Arrows
394,717
Factor Arrows
713,531
Factor Arrows
71,933

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, 7, 1933

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 7 x 7 x 1,933 = 18,185,664

This can also be written as 26 x 31 x 72 x 1,9331 = 18,185,664

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


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