Q: What are the prime factors of the number 166,725,321?

 A: 3, 7, 23, 29, 11903

Why are those the prime factors of the number 166,725,321?

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 166,725,321

166,725,321
Factor Arrows
355,575,107
Factor Arrows
77,939,301
Factor Arrows
23345,187
Factor Arrows
2911,903

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, 7, 23, 29, 11903

We can check our work by multiplying all of the prime factors together: 3 x 7 x 23 x 29 x 11,903 = 166,725,321

This can also be written as 31 x 71 x 231 x 291 x 11,9031 = 166,725,321

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


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