Q: What are the prime factors of the number 100,313,136?

 A: 2, 3, 7, 11, 83, 109

Why are those the prime factors of the number 100,313,136?

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 100,313,136

100,313,136
Factor Arrows
250,156,568
Factor Arrows
225,078,284
Factor Arrows
212,539,142
Factor Arrows
26,269,571
Factor Arrows
32,089,857
Factor Arrows
3696,619
Factor Arrows
799,517
Factor Arrows
119,047
Factor Arrows
83109

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, 7, 11, 83, 109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 7 x 11 x 83 x 109 = 100,313,136

This can also be written as 24 x 32 x 71 x 111 x 831 x 1091 = 100,313,136

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


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