Q: What are the prime factors of the number 686,786,604?

 A: 2, 3, 7, 17, 331, 1453

Why are those the prime factors of the number 686,786,604?

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 686,786,604

686,786,604
Factor Arrows
2343,393,302
Factor Arrows
2171,696,651
Factor Arrows
357,232,217
Factor Arrows
78,176,031
Factor Arrows
17480,943
Factor Arrows
3311,453

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, 17, 331, 1453

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 7 x 17 x 331 x 1,453 = 686,786,604

This can also be written as 22 x 31 x 71 x 171 x 3311 x 1,4531 = 686,786,604

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


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