Q: What are the prime factors of the number 400,270,486?

 A: 2, 7, 11, 397, 6547

Why are those the prime factors of the number 400,270,486?

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 400,270,486

400,270,486
Factor Arrows
2200,135,243
Factor Arrows
728,590,749
Factor Arrows
112,599,159
Factor Arrows
3976,547

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, 11, 397, 6547

We can check our work by multiplying all of the prime factors together: 2 x 7 x 11 x 397 x 6,547 = 400,270,486

This can also be written as 21 x 71 x 111 x 3971 x 6,5471 = 400,270,486

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


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