Q: What are the prime factors of the number 2,085,900?

 A: 2, 3, 5, 17, 409

Why are those the prime factors of the number 2,085,900?

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 2,085,900

2,085,900
Factor Arrows
21,042,950
Factor Arrows
2521,475
Factor Arrows
3173,825
Factor Arrows
534,765
Factor Arrows
56,953
Factor Arrows
17409

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, 17, 409

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 17 x 409 = 2,085,900

This can also be written as 22 x 31 x 52 x 171 x 4091 = 2,085,900

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


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