Q: What are the prime factors of the number 305,123,375?

 A: 5, 19, 128473

Why are those the prime factors of the number 305,123,375?

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 305,123,375

305,123,375
Factor Arrows
561,024,675
Factor Arrows
512,204,935
Factor Arrows
52,440,987
Factor Arrows
19128,473

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, 19, 128473

We can check our work by multiplying all of the prime factors together: 5 x 5 x 5 x 19 x 128,473 = 305,123,375

This can also be written as 53 x 191 x 128,4731 = 305,123,375

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


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