Q: What are the prime factors of the number 12,506,560?

 A: 2, 5, 11, 17, 19

Why are those the prime factors of the number 12,506,560?

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 12,506,560

12,506,560
Factor Arrows
26,253,280
Factor Arrows
23,126,640
Factor Arrows
21,563,320
Factor Arrows
2781,660
Factor Arrows
2390,830
Factor Arrows
2195,415
Factor Arrows
539,083
Factor Arrows
113,553
Factor Arrows
11323
Factor Arrows
1719

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, 5, 11, 17, 19

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 5 x 11 x 11 x 17 x 19 = 12,506,560

This can also be written as 26 x 51 x 112 x 171 x 191 = 12,506,560

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


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