Q: What are the prime factors of the number 217,656,960?

 A: 2, 3, 5, 113363

Why are those the prime factors of the number 217,656,960?

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 217,656,960

217,656,960
Factor Arrows
2108,828,480
Factor Arrows
254,414,240
Factor Arrows
227,207,120
Factor Arrows
213,603,560
Factor Arrows
26,801,780
Factor Arrows
23,400,890
Factor Arrows
21,700,445
Factor Arrows
3566,815
Factor Arrows
5113,363

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, 113363

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 3 x 5 x 113,363 = 217,656,960

This can also be written as 27 x 31 x 51 x 113,3631 = 217,656,960

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


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