Q: What are the prime factors of the number 403,632,520?

 A: 2, 5, 23, 97, 4523

Why are those the prime factors of the number 403,632,520?

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 403,632,520

403,632,520
Factor Arrows
2201,816,260
Factor Arrows
2100,908,130
Factor Arrows
250,454,065
Factor Arrows
510,090,813
Factor Arrows
23438,731
Factor Arrows
974,523

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, 23, 97, 4523

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 23 x 97 x 4,523 = 403,632,520

This can also be written as 23 x 51 x 231 x 971 x 4,5231 = 403,632,520

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


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