Q: What are the prime factors of the number 90,822,400?

 A: 2, 5, 23, 617

Why are those the prime factors of the number 90,822,400?

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 90,822,400

90,822,400
Factor Arrows
245,411,200
Factor Arrows
222,705,600
Factor Arrows
211,352,800
Factor Arrows
25,676,400
Factor Arrows
22,838,200
Factor Arrows
21,419,100
Factor Arrows
2709,550
Factor Arrows
2354,775
Factor Arrows
570,955
Factor Arrows
514,191
Factor Arrows
23617

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, 5, 23, 617

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 5 x 5 x 23 x 617 = 90,822,400

This can also be written as 28 x 52 x 231 x 6171 = 90,822,400

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


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