Q: What are the prime factors of the number 402,330,312?

 A: 2, 3, 277, 20173

Why are those the prime factors of the number 402,330,312?

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 402,330,312

402,330,312
Factor Arrows
2201,165,156
Factor Arrows
2100,582,578
Factor Arrows
250,291,289
Factor Arrows
316,763,763
Factor Arrows
35,587,921
Factor Arrows
27720,173

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, 277, 20173

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 277 x 20,173 = 402,330,312

This can also be written as 23 x 32 x 2771 x 20,1731 = 402,330,312

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


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