Q: What are the prime factors of the number 12,565,440?

 A: 2, 3, 5, 4363

Why are those the prime factors of the number 12,565,440?

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 12,565,440

12,565,440
Factor Arrows
26,282,720
Factor Arrows
23,141,360
Factor Arrows
21,570,680
Factor Arrows
2785,340
Factor Arrows
2392,670
Factor Arrows
2196,335
Factor Arrows
365,445
Factor Arrows
321,815
Factor Arrows
54,363

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, 4363

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 3 x 3 x 5 x 4,363 = 12,565,440

This can also be written as 26 x 32 x 51 x 4,3631 = 12,565,440

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


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