Q: What are the prime factors of the number 305,745,510?

 A: 2, 3, 5, 7, 17, 85643

Why are those the prime factors of the number 305,745,510?

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 305,745,510

305,745,510
Factor Arrows
2152,872,755
Factor Arrows
350,957,585
Factor Arrows
510,191,517
Factor Arrows
71,455,931
Factor Arrows
1785,643

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, 7, 17, 85643

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 7 x 17 x 85,643 = 305,745,510

This can also be written as 21 x 31 x 51 x 71 x 171 x 85,6431 = 305,745,510

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


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