Q: What are the prime factors of the number 78,215,744?

 A: 2, 127, 9623

Why are those the prime factors of the number 78,215,744?

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 78,215,744

78,215,744
Factor Arrows
239,107,872
Factor Arrows
219,553,936
Factor Arrows
29,776,968
Factor Arrows
24,888,484
Factor Arrows
22,444,242
Factor Arrows
21,222,121
Factor Arrows
1279,623

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, 127, 9623

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 127 x 9,623 = 78,215,744

This can also be written as 26 x 1271 x 9,6231 = 78,215,744

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


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