Q: What are the prime factors of the number 402,051,632?

 A: 2, 17, 421, 3511

Why are those the prime factors of the number 402,051,632?

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 402,051,632

402,051,632
Factor Arrows
2201,025,816
Factor Arrows
2100,512,908
Factor Arrows
250,256,454
Factor Arrows
225,128,227
Factor Arrows
171,478,131
Factor Arrows
4213,511

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, 17, 421, 3511

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 17 x 421 x 3,511 = 402,051,632

This can also be written as 24 x 171 x 4211 x 3,5111 = 402,051,632

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


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