Q: What are the prime factors of the number 723,407,370?

 A: 2, 3, 5, 7, 73, 47189

Why are those the prime factors of the number 723,407,370?

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 723,407,370

723,407,370
Factor Arrows
2361,703,685
Factor Arrows
3120,567,895
Factor Arrows
524,113,579
Factor Arrows
73,444,797
Factor Arrows
7347,189

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, 73, 47189

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 7 x 73 x 47,189 = 723,407,370

This can also be written as 21 x 31 x 51 x 71 x 731 x 47,1891 = 723,407,370

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


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