Q: What are the prime factors of the number 126,263,872?

 A: 2, 7, 281839

Why are those the prime factors of the number 126,263,872?

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 126,263,872

126,263,872
Factor Arrows
263,131,936
Factor Arrows
231,565,968
Factor Arrows
215,782,984
Factor Arrows
27,891,492
Factor Arrows
23,945,746
Factor Arrows
21,972,873
Factor Arrows
7281,839

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, 281839

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 7 x 281,839 = 126,263,872

This can also be written as 26 x 71 x 281,8391 = 126,263,872

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


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