Q: What are the prime factors of the number 170,400,256?

 A: 2, 13, 25601

Why are those the prime factors of the number 170,400,256?

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 170,400,256

170,400,256
Factor Arrows
285,200,128
Factor Arrows
242,600,064
Factor Arrows
221,300,032
Factor Arrows
210,650,016
Factor Arrows
25,325,008
Factor Arrows
22,662,504
Factor Arrows
21,331,252
Factor Arrows
2665,626
Factor Arrows
2332,813
Factor Arrows
1325,601

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, 13, 25601

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 13 x 25,601 = 170,400,256

This can also be written as 29 x 131 x 25,6011 = 170,400,256

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


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