Q: What are the prime factors of the number 402,433,325?

 A: 5, 7, 71, 661

Why are those the prime factors of the number 402,433,325?

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 402,433,325

402,433,325
Factor Arrows
580,486,665
Factor Arrows
516,097,333
Factor Arrows
72,299,619
Factor Arrows
7328,517
Factor Arrows
746,931
Factor Arrows
71661

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:

5, 7, 71, 661

We can check our work by multiplying all of the prime factors together: 5 x 5 x 7 x 7 x 7 x 71 x 661 = 402,433,325

This can also be written as 52 x 73 x 711 x 6611 = 402,433,325

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


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