Q: What are the prime factors of the number 721,663,500?

 A: 2, 3, 5, 481109

Why are those the prime factors of the number 721,663,500?

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 721,663,500

721,663,500
Factor Arrows
2360,831,750
Factor Arrows
2180,415,875
Factor Arrows
360,138,625
Factor Arrows
512,027,725
Factor Arrows
52,405,545
Factor Arrows
5481,109

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, 481109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 5 x 481,109 = 721,663,500

This can also be written as 22 x 31 x 53 x 481,1091 = 721,663,500

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


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