Q: What are the prime factors of the number 217,764,207?

 A: 3, 23, 47, 829

Why are those the prime factors of the number 217,764,207?

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 217,764,207

217,764,207
Factor Arrows
372,588,069
Factor Arrows
324,196,023
Factor Arrows
38,065,341
Factor Arrows
32,688,447
Factor Arrows
3896,149
Factor Arrows
2338,963
Factor Arrows
47829

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:

3, 23, 47, 829

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 23 x 47 x 829 = 217,764,207

This can also be written as 35 x 231 x 471 x 8291 = 217,764,207

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


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