Q: What are the prime factors of the number 722,173,200?

 A: 2, 3, 5, 7, 149, 577

Why are those the prime factors of the number 722,173,200?

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 722,173,200

722,173,200
Factor Arrows
2361,086,600
Factor Arrows
2180,543,300
Factor Arrows
290,271,650
Factor Arrows
245,135,825
Factor Arrows
315,045,275
Factor Arrows
53,009,055
Factor Arrows
5601,811
Factor Arrows
785,973
Factor Arrows
149577

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, 7, 149, 577

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 5 x 7 x 149 x 577 = 722,173,200

This can also be written as 24 x 31 x 52 x 71 x 1491 x 5771 = 722,173,200

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


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