Q: What are the prime factors of the number 71,856,372?

 A: 2, 3, 7, 443, 1931

Why are those the prime factors of the number 71,856,372?

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 71,856,372

71,856,372
Factor Arrows
235,928,186
Factor Arrows
217,964,093
Factor Arrows
35,988,031
Factor Arrows
7855,433
Factor Arrows
4431,931

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, 7, 443, 1931

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 7 x 443 x 1,931 = 71,856,372

This can also be written as 22 x 31 x 71 x 4431 x 1,9311 = 71,856,372

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


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