Q: What are the prime factors of the number 722,288,160?

 A: 2, 3, 5, 11, 45599

Why are those the prime factors of the number 722,288,160?

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 722,288,160

722,288,160
Factor Arrows
2361,144,080
Factor Arrows
2180,572,040
Factor Arrows
290,286,020
Factor Arrows
245,143,010
Factor Arrows
222,571,505
Factor Arrows
37,523,835
Factor Arrows
32,507,945
Factor Arrows
5501,589
Factor Arrows
1145,599

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, 11, 45599

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 11 x 45,599 = 722,288,160

This can also be written as 25 x 32 x 51 x 111 x 45,5991 = 722,288,160

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


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