Q: What are the prime factors of the number 722,151,744?

 A: 2, 3, 149, 25243

Why are those the prime factors of the number 722,151,744?

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 722,151,744

722,151,744
Factor Arrows
2361,075,872
Factor Arrows
2180,537,936
Factor Arrows
290,268,968
Factor Arrows
245,134,484
Factor Arrows
222,567,242
Factor Arrows
211,283,621
Factor Arrows
33,761,207
Factor Arrows
14925,243

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, 149, 25243

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 3 x 149 x 25,243 = 722,151,744

This can also be written as 26 x 31 x 1491 x 25,2431 = 722,151,744

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


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