Q: What are the prime factors of the number 4,638,816?

 A: 2, 3, 7, 13, 59

Why are those the prime factors of the number 4,638,816?

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 4,638,816

4,638,816
Factor Arrows
22,319,408
Factor Arrows
21,159,704
Factor Arrows
2579,852
Factor Arrows
2289,926
Factor Arrows
2144,963
Factor Arrows
348,321
Factor Arrows
316,107
Factor Arrows
35,369
Factor Arrows
7767
Factor Arrows
1359

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, 13, 59

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 7 x 13 x 59 = 4,638,816

This can also be written as 25 x 33 x 71 x 131 x 591 = 4,638,816

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


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