Q: What are the prime factors of the number 770,615,328?

 A: 2, 3, 7, 641, 1789

Why are those the prime factors of the number 770,615,328?

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 770,615,328

770,615,328
Factor Arrows
2385,307,664
Factor Arrows
2192,653,832
Factor Arrows
296,326,916
Factor Arrows
248,163,458
Factor Arrows
224,081,729
Factor Arrows
38,027,243
Factor Arrows
71,146,749
Factor Arrows
6411,789

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, 7, 641, 1789

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 641 x 1,789 = 770,615,328

This can also be written as 25 x 31 x 71 x 6411 x 1,7891 = 770,615,328

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


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