Q: What are the prime factors of the number 213,100,000?

 A: 2, 5, 2131

Why are those the prime factors of the number 213,100,000?

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 213,100,000

213,100,000
Factor Arrows
2106,550,000
Factor Arrows
253,275,000
Factor Arrows
226,637,500
Factor Arrows
213,318,750
Factor Arrows
26,659,375
Factor Arrows
51,331,875
Factor Arrows
5266,375
Factor Arrows
553,275
Factor Arrows
510,655
Factor Arrows
52,131

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, 2131

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 5 x 2,131 = 213,100,000

This can also be written as 25 x 55 x 2,1311 = 213,100,000

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


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