Q: What are the prime factors of the number 211,005,000?

 A: 2, 3, 5, 521

Why are those the prime factors of the number 211,005,000?

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 211,005,000

211,005,000
Factor Arrows
2105,502,500
Factor Arrows
252,751,250
Factor Arrows
226,375,625
Factor Arrows
38,791,875
Factor Arrows
32,930,625
Factor Arrows
3976,875
Factor Arrows
3325,625
Factor Arrows
565,125
Factor Arrows
513,025
Factor Arrows
52,605
Factor Arrows
5521

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, 3, 5, 521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 5 x 5 x 5 x 521 = 211,005,000

This can also be written as 23 x 34 x 54 x 5211 = 211,005,000

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


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