Q: What are the prime factors of the number 202,120,000?

 A: 2, 5, 31, 163

Why are those the prime factors of the number 202,120,000?

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 202,120,000

202,120,000
Factor Arrows
2101,060,000
Factor Arrows
250,530,000
Factor Arrows
225,265,000
Factor Arrows
212,632,500
Factor Arrows
26,316,250
Factor Arrows
23,158,125
Factor Arrows
5631,625
Factor Arrows
5126,325
Factor Arrows
525,265
Factor Arrows
55,053
Factor Arrows
31163

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, 31, 163

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 5 x 5 x 5 x 5 x 31 x 163 = 202,120,000

This can also be written as 26 x 54 x 311 x 1631 = 202,120,000

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


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