Q: What are the prime factors of the number 5,172,660?

 A: 2, 3, 5, 31, 103

Why are those the prime factors of the number 5,172,660?

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 5,172,660

5,172,660
Factor Arrows
22,586,330
Factor Arrows
21,293,165
Factor Arrows
3431,055
Factor Arrows
3143,685
Factor Arrows
347,895
Factor Arrows
315,965
Factor Arrows
53,193
Factor Arrows
31103

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, 5, 31, 103

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 5 x 31 x 103 = 5,172,660

This can also be written as 22 x 34 x 51 x 311 x 1031 = 5,172,660

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


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