Q: What are the prime factors of the number 14,128,128?

 A: 2, 3, 7, 73

Why are those the prime factors of the number 14,128,128?

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 14,128,128

14,128,128
Factor Arrows
27,064,064
Factor Arrows
23,532,032
Factor Arrows
21,766,016
Factor Arrows
2883,008
Factor Arrows
2441,504
Factor Arrows
2220,752
Factor Arrows
2110,376
Factor Arrows
255,188
Factor Arrows
227,594
Factor Arrows
213,797
Factor Arrows
34,599
Factor Arrows
31,533
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 3 x 3 x 3 x 7 x 73 = 14,128,128

This can also be written as 210 x 33 x 71 x 731 = 14,128,128

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


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