Q: What are the prime factors of the number 12,582,864?

 A: 2, 3, 7, 19, 73

Why are those the prime factors of the number 12,582,864?

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 12,582,864

12,582,864
Factor Arrows
26,291,432
Factor Arrows
23,145,716
Factor Arrows
21,572,858
Factor Arrows
2786,429
Factor Arrows
3262,143
Factor Arrows
387,381
Factor Arrows
329,127
Factor Arrows
39,709
Factor Arrows
71,387
Factor Arrows
1973

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, 7, 19, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 7 x 19 x 73 = 12,582,864

This can also be written as 24 x 34 x 71 x 191 x 731 = 12,582,864

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


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