Q: What are the prime factors of the number 8,724,736?

 A: 2, 173, 197

Why are those the prime factors of the number 8,724,736?

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 8,724,736

8,724,736
Factor Arrows
24,362,368
Factor Arrows
22,181,184
Factor Arrows
21,090,592
Factor Arrows
2545,296
Factor Arrows
2272,648
Factor Arrows
2136,324
Factor Arrows
268,162
Factor Arrows
234,081
Factor Arrows
173197

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, 173, 197

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 173 x 197 = 8,724,736

This can also be written as 28 x 1731 x 1971 = 8,724,736

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


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