Q: What are the prime factors of the number 89,618,816?

 A: 2, 7, 29, 3449

Why are those the prime factors of the number 89,618,816?

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 89,618,816

89,618,816
Factor Arrows
244,809,408
Factor Arrows
222,404,704
Factor Arrows
211,202,352
Factor Arrows
25,601,176
Factor Arrows
22,800,588
Factor Arrows
21,400,294
Factor Arrows
2700,147
Factor Arrows
7100,021
Factor Arrows
293,449

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, 29, 3449

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 7 x 29 x 3,449 = 89,618,816

This can also be written as 27 x 71 x 291 x 3,4491 = 89,618,816

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


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