Q: What are the prime factors of the number 720,188,064?

 A: 2, 3, 631, 1321

Why are those the prime factors of the number 720,188,064?

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 720,188,064

720,188,064
Factor Arrows
2360,094,032
Factor Arrows
2180,047,016
Factor Arrows
290,023,508
Factor Arrows
245,011,754
Factor Arrows
222,505,877
Factor Arrows
37,501,959
Factor Arrows
32,500,653
Factor Arrows
3833,551
Factor Arrows
6311,321

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, 631, 1321

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 3 x 631 x 1,321 = 720,188,064

This can also be written as 25 x 33 x 6311 x 1,3211 = 720,188,064

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


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