Q: What are the prime factors of the number 217,040,576?

 A: 2, 1187, 2857

Why are those the prime factors of the number 217,040,576?

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 217,040,576

217,040,576
Factor Arrows
2108,520,288
Factor Arrows
254,260,144
Factor Arrows
227,130,072
Factor Arrows
213,565,036
Factor Arrows
26,782,518
Factor Arrows
23,391,259
Factor Arrows
1,1872,857

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, 1187, 2857

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 1,187 x 2,857 = 217,040,576

This can also be written as 26 x 1,1871 x 2,8571 = 217,040,576

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


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