Q: What are the prime factors of the number 772,775,856?

 A: 2, 3, 67, 26699

Why are those the prime factors of the number 772,775,856?

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 772,775,856

772,775,856
Factor Arrows
2386,387,928
Factor Arrows
2193,193,964
Factor Arrows
296,596,982
Factor Arrows
248,298,491
Factor Arrows
316,099,497
Factor Arrows
35,366,499
Factor Arrows
31,788,833
Factor Arrows
6726,699

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, 67, 26699

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 3 x 67 x 26,699 = 772,775,856

This can also be written as 24 x 33 x 671 x 26,6991 = 772,775,856

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


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