Q: What are the prime factors of the number 402,354,360?

 A: 2, 3, 5, 523, 2137

Why are those the prime factors of the number 402,354,360?

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 402,354,360

402,354,360
Factor Arrows
2201,177,180
Factor Arrows
2100,588,590
Factor Arrows
250,294,295
Factor Arrows
316,764,765
Factor Arrows
35,588,255
Factor Arrows
51,117,651
Factor Arrows
5232,137

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, 523, 2137

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 523 x 2,137 = 402,354,360

This can also be written as 23 x 32 x 51 x 5231 x 2,1371 = 402,354,360

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


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