Q: What are the prime factors of the number 87,101,872?

 A: 2, 11, 13, 38069

Why are those the prime factors of the number 87,101,872?

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 87,101,872

87,101,872
Factor Arrows
243,550,936
Factor Arrows
221,775,468
Factor Arrows
210,887,734
Factor Arrows
25,443,867
Factor Arrows
11494,897
Factor Arrows
1338,069

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, 11, 13, 38069

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 11 x 13 x 38,069 = 87,101,872

This can also be written as 24 x 111 x 131 x 38,0691 = 87,101,872

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


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