Q: What are the prime factors of the number 12,021,312?

 A: 2, 3, 17, 29, 127

Why are those the prime factors of the number 12,021,312?

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 12,021,312

12,021,312
Factor Arrows
26,010,656
Factor Arrows
23,005,328
Factor Arrows
21,502,664
Factor Arrows
2751,332
Factor Arrows
2375,666
Factor Arrows
2187,833
Factor Arrows
362,611
Factor Arrows
173,683
Factor Arrows
29127

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, 17, 29, 127

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 17 x 29 x 127 = 12,021,312

This can also be written as 26 x 31 x 171 x 291 x 1271 = 12,021,312

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


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