Q: What are the prime factors of the number 105,133,312?

 A: 2, 499, 823

Why are those the prime factors of the number 105,133,312?

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 105,133,312

105,133,312
Factor Arrows
252,566,656
Factor Arrows
226,283,328
Factor Arrows
213,141,664
Factor Arrows
26,570,832
Factor Arrows
23,285,416
Factor Arrows
21,642,708
Factor Arrows
2821,354
Factor Arrows
2410,677
Factor Arrows
499823

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, 499, 823

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 499 x 823 = 105,133,312

This can also be written as 28 x 4991 x 8231 = 105,133,312

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


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