Q: What are the prime factors of the number 724,736?

 A: 2, 19, 149

Why are those the prime factors of the number 724,736?

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 724,736

724,736
Factor Arrows
2362,368
Factor Arrows
2181,184
Factor Arrows
290,592
Factor Arrows
245,296
Factor Arrows
222,648
Factor Arrows
211,324
Factor Arrows
25,662
Factor Arrows
22,831
Factor Arrows
19149

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, 19, 149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 19 x 149 = 724,736

This can also be written as 28 x 191 x 1491 = 724,736

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


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