Q: What are the prime factors of the number 28,715,850?

 A: 2, 3, 5, 89, 239

Why are those the prime factors of the number 28,715,850?

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 28,715,850

28,715,850
Factor Arrows
214,357,925
Factor Arrows
34,785,975
Factor Arrows
31,595,325
Factor Arrows
3531,775
Factor Arrows
5106,355
Factor Arrows
521,271
Factor Arrows
89239

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, 5, 89, 239

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 5 x 89 x 239 = 28,715,850

This can also be written as 21 x 33 x 52 x 891 x 2391 = 28,715,850

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


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