Q: What are the prime factors of the number 128,318,016?

 A: 2, 3, 71, 9413

Why are those the prime factors of the number 128,318,016?

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 128,318,016

128,318,016
Factor Arrows
264,159,008
Factor Arrows
232,079,504
Factor Arrows
216,039,752
Factor Arrows
28,019,876
Factor Arrows
24,009,938
Factor Arrows
22,004,969
Factor Arrows
3668,323
Factor Arrows
719,413

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, 71, 9413

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 71 x 9,413 = 128,318,016

This can also be written as 26 x 31 x 711 x 9,4131 = 128,318,016

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


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