Q: What are the prime factors of the number 351,871,020?

 A: 2, 3, 5, 23, 41, 691

Why are those the prime factors of the number 351,871,020?

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 351,871,020

351,871,020
Factor Arrows
2175,935,510
Factor Arrows
287,967,755
Factor Arrows
329,322,585
Factor Arrows
39,774,195
Factor Arrows
33,258,065
Factor Arrows
5651,613
Factor Arrows
2328,331
Factor Arrows
41691

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, 5, 23, 41, 691

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 5 x 23 x 41 x 691 = 351,871,020

This can also be written as 22 x 33 x 51 x 231 x 411 x 6911 = 351,871,020

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


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