Q: What are the prime factors of the number 217,141,575?

 A: 3, 5, 7, 137, 3019

Why are those the prime factors of the number 217,141,575?

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 217,141,575

217,141,575
Factor Arrows
372,380,525
Factor Arrows
514,476,105
Factor Arrows
52,895,221
Factor Arrows
7413,603
Factor Arrows
1373,019

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, 5, 7, 137, 3019

We can check our work by multiplying all of the prime factors together: 3 x 5 x 5 x 7 x 137 x 3,019 = 217,141,575

This can also be written as 31 x 52 x 71 x 1371 x 3,0191 = 217,141,575

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


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