Q: What are the prime factors of the number 305,385,830?

 A: 2, 5, 193, 158231

Why are those the prime factors of the number 305,385,830?

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 305,385,830

305,385,830
Factor Arrows
2152,692,915
Factor Arrows
530,538,583
Factor Arrows
193158,231

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, 5, 193, 158231

We can check our work by multiplying all of the prime factors together: 2 x 5 x 193 x 158,231 = 305,385,830

This can also be written as 21 x 51 x 1931 x 158,2311 = 305,385,830

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


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