Q: What are the prime factors of the number 305,728,788?

 A: 2, 3, 23, 29, 38197

Why are those the prime factors of the number 305,728,788?

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 305,728,788

305,728,788
Factor Arrows
2152,864,394
Factor Arrows
276,432,197
Factor Arrows
325,477,399
Factor Arrows
231,107,713
Factor Arrows
2938,197

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, 23, 29, 38197

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 23 x 29 x 38,197 = 305,728,788

This can also be written as 22 x 31 x 231 x 291 x 38,1971 = 305,728,788

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


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