Q: What are the prime factors of the number 10,399,900?

 A: 2, 5, 7, 83, 179

Why are those the prime factors of the number 10,399,900?

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 10,399,900

10,399,900
Factor Arrows
25,199,950
Factor Arrows
22,599,975
Factor Arrows
5519,995
Factor Arrows
5103,999
Factor Arrows
714,857
Factor Arrows
83179

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, 5, 7, 83, 179

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 7 x 83 x 179 = 10,399,900

This can also be written as 22 x 52 x 71 x 831 x 1791 = 10,399,900

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


More Examples

Here are some more numbers to try:

Try the factor calculator

Explore more about the number 10,399,900:


Ask a Question