Q: What are the prime factors of the number 721,752?

 A: 2, 3, 17, 29, 61

Why are those the prime factors of the number 721,752?

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 721,752

721,752
Factor Arrows
2360,876
Factor Arrows
2180,438
Factor Arrows
290,219
Factor Arrows
330,073
Factor Arrows
171,769
Factor Arrows
2961

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, 17, 29, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 17 x 29 x 61 = 721,752

This can also be written as 23 x 31 x 171 x 291 x 611 = 721,752

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


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