Q: What are the prime factors of the number 5,157,240?

 A: 2, 3, 5, 11, 3907

Why are those the prime factors of the number 5,157,240?

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 5,157,240

5,157,240
Factor Arrows
22,578,620
Factor Arrows
21,289,310
Factor Arrows
2644,655
Factor Arrows
3214,885
Factor Arrows
542,977
Factor Arrows
113,907

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, 11, 3907

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 11 x 3,907 = 5,157,240

This can also be written as 23 x 31 x 51 x 111 x 3,9071 = 5,157,240

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


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