Q: What are the prime factors of the number 765,412,440?

 A: 2, 3, 5, 13, 419, 1171

Why are those the prime factors of the number 765,412,440?

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 765,412,440

765,412,440
Factor Arrows
2382,706,220
Factor Arrows
2191,353,110
Factor Arrows
295,676,555
Factor Arrows
331,892,185
Factor Arrows
56,378,437
Factor Arrows
13490,649
Factor Arrows
4191,171

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, 5, 13, 419, 1171

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 13 x 419 x 1,171 = 765,412,440

This can also be written as 23 x 31 x 51 x 131 x 4191 x 1,1711 = 765,412,440

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


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