Q: What are the prime factors of the number 400,404,417?

 A: 3, 7, 17, 37, 30313

Why are those the prime factors of the number 400,404,417?

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 400,404,417

400,404,417
Factor Arrows
3133,468,139
Factor Arrows
719,066,877
Factor Arrows
171,121,581
Factor Arrows
3730,313

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:

3, 7, 17, 37, 30313

We can check our work by multiplying all of the prime factors together: 3 x 7 x 17 x 37 x 30,313 = 400,404,417

This can also be written as 31 x 71 x 171 x 371 x 30,3131 = 400,404,417

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


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