Q: What are the prime factors of the number 765,648?

 A: 2, 3, 13, 409

Why are those the prime factors of the number 765,648?

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 765,648

765,648
Factor Arrows
2382,824
Factor Arrows
2191,412
Factor Arrows
295,706
Factor Arrows
247,853
Factor Arrows
315,951
Factor Arrows
35,317
Factor Arrows
13409

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, 13, 409

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 13 x 409 = 765,648

This can also be written as 24 x 32 x 131 x 4091 = 765,648

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


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