Q: What are the prime factors of the number 202,220,000?

 A: 2, 5, 10111

Why are those the prime factors of the number 202,220,000?

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 202,220,000

202,220,000
Factor Arrows
2101,110,000
Factor Arrows
250,555,000
Factor Arrows
225,277,500
Factor Arrows
212,638,750
Factor Arrows
26,319,375
Factor Arrows
51,263,875
Factor Arrows
5252,775
Factor Arrows
550,555
Factor Arrows
510,111

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, 10111

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 5 x 5 x 10,111 = 202,220,000

This can also be written as 25 x 54 x 10,1111 = 202,220,000

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


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