Q: What are the prime factors of the number 15,625,800?

 A: 2, 3, 5, 8681

Why are those the prime factors of the number 15,625,800?

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 15,625,800

15,625,800
Factor Arrows
27,812,900
Factor Arrows
23,906,450
Factor Arrows
21,953,225
Factor Arrows
3651,075
Factor Arrows
3217,025
Factor Arrows
543,405
Factor Arrows
58,681

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, 8681

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 5 x 8,681 = 15,625,800

This can also be written as 23 x 32 x 52 x 8,6811 = 15,625,800

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


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