Q: What are the prime factors of the number 71,520,672?

 A: 2, 3, 499, 1493

Why are those the prime factors of the number 71,520,672?

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 71,520,672

71,520,672
Factor Arrows
235,760,336
Factor Arrows
217,880,168
Factor Arrows
28,940,084
Factor Arrows
24,470,042
Factor Arrows
22,235,021
Factor Arrows
3745,007
Factor Arrows
4991,493

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, 499, 1493

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 499 x 1,493 = 71,520,672

This can also be written as 25 x 31 x 4991 x 1,4931 = 71,520,672

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


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