Q: What are the prime factors of the number 635,122,400?

 A: 2, 5, 11, 72173

Why are those the prime factors of the number 635,122,400?

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 635,122,400

635,122,400
Factor Arrows
2317,561,200
Factor Arrows
2158,780,600
Factor Arrows
279,390,300
Factor Arrows
239,695,150
Factor Arrows
219,847,575
Factor Arrows
53,969,515
Factor Arrows
5793,903
Factor Arrows
1172,173

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, 11, 72173

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 11 x 72,173 = 635,122,400

This can also be written as 25 x 52 x 111 x 72,1731 = 635,122,400

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


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