Q: What are the prime factors of the number 307,412,768?

 A: 2, 13, 17, 2557

Why are those the prime factors of the number 307,412,768?

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 307,412,768

307,412,768
Factor Arrows
2153,706,384
Factor Arrows
276,853,192
Factor Arrows
238,426,596
Factor Arrows
219,213,298
Factor Arrows
29,606,649
Factor Arrows
13738,973
Factor Arrows
1743,469
Factor Arrows
172,557

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, 13, 17, 2557

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 13 x 17 x 17 x 2,557 = 307,412,768

This can also be written as 25 x 131 x 172 x 2,5571 = 307,412,768

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


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