Q: What are the prime factors of the number 10,005,800?

 A: 2, 5, 7, 1021

Why are those the prime factors of the number 10,005,800?

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 10,005,800

10,005,800
Factor Arrows
25,002,900
Factor Arrows
22,501,450
Factor Arrows
21,250,725
Factor Arrows
5250,145
Factor Arrows
550,029
Factor Arrows
77,147
Factor Arrows
71,021

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, 1021

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 7 x 7 x 1,021 = 10,005,800

This can also be written as 23 x 52 x 72 x 1,0211 = 10,005,800

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


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