Q: What are the prime factors of the number 12,558,336?

 A: 2, 3, 7, 73

Why are those the prime factors of the number 12,558,336?

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 12,558,336

12,558,336
Factor Arrows
26,279,168
Factor Arrows
23,139,584
Factor Arrows
21,569,792
Factor Arrows
2784,896
Factor Arrows
2392,448
Factor Arrows
2196,224
Factor Arrows
298,112
Factor Arrows
249,056
Factor Arrows
224,528
Factor Arrows
212,264
Factor Arrows
26,132
Factor Arrows
23,066
Factor Arrows
21,533
Factor Arrows
3511
Factor Arrows
773

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, 73

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 x 2 x 2 x 3 x 7 x 73 = 12,558,336

This can also be written as 213 x 31 x 71 x 731 = 12,558,336

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


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