Q: What are the prime factors of the number 12,563,520?

 A: 2, 3, 5, 23, 569

Why are those the prime factors of the number 12,563,520?

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 12,563,520

12,563,520
Factor Arrows
26,281,760
Factor Arrows
23,140,880
Factor Arrows
21,570,440
Factor Arrows
2785,220
Factor Arrows
2392,610
Factor Arrows
2196,305
Factor Arrows
365,435
Factor Arrows
513,087
Factor Arrows
23569

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, 23, 569

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 5 x 23 x 569 = 12,563,520

This can also be written as 26 x 31 x 51 x 231 x 5691 = 12,563,520

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


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