Q: What are the prime factors of the number 240,128?

 A: 2, 7, 67

Why are those the prime factors of the number 240,128?

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 240,128

240,128
Factor Arrows
2120,064
Factor Arrows
260,032
Factor Arrows
230,016
Factor Arrows
215,008
Factor Arrows
27,504
Factor Arrows
23,752
Factor Arrows
21,876
Factor Arrows
2938
Factor Arrows
2469
Factor Arrows
767

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, 7, 67

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 7 x 67 = 240,128

This can also be written as 29 x 71 x 671 = 240,128

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


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