Q: What are the prime factors of the number 211,120,000?

 A: 2, 5, 7, 13, 29

Why are those the prime factors of the number 211,120,000?

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 211,120,000

211,120,000
Factor Arrows
2105,560,000
Factor Arrows
252,780,000
Factor Arrows
226,390,000
Factor Arrows
213,195,000
Factor Arrows
26,597,500
Factor Arrows
23,298,750
Factor Arrows
21,649,375
Factor Arrows
5329,875
Factor Arrows
565,975
Factor Arrows
513,195
Factor Arrows
52,639
Factor Arrows
7377
Factor Arrows
1329

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, 7, 13, 29

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 2 x 5 x 5 x 5 x 5 x 7 x 13 x 29 = 211,120,000

This can also be written as 27 x 54 x 71 x 131 x 291 = 211,120,000

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


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