Q: What are the prime factors of the number 767,661,405?

 A: 3, 5, 7, 199, 36739

Why are those the prime factors of the number 767,661,405?

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 767,661,405

767,661,405
Factor Arrows
3255,887,135
Factor Arrows
551,177,427
Factor Arrows
77,311,061
Factor Arrows
19936,739

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:

3, 5, 7, 199, 36739

We can check our work by multiplying all of the prime factors together: 3 x 5 x 7 x 199 x 36,739 = 767,661,405

This can also be written as 31 x 51 x 71 x 1991 x 36,7391 = 767,661,405

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


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