Q: What are the prime factors of the number 2,581,504?

 A: 2, 2521

Why are those the prime factors of the number 2,581,504?

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 2,581,504

2,581,504
Factor Arrows
21,290,752
Factor Arrows
2645,376
Factor Arrows
2322,688
Factor Arrows
2161,344
Factor Arrows
280,672
Factor Arrows
240,336
Factor Arrows
220,168
Factor Arrows
210,084
Factor Arrows
25,042
Factor Arrows
22,521

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, 2521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2,521 = 2,581,504

This can also be written as 210 x 2,5211 = 2,581,504

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


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