Q: What are the prime factors of the number 166,273,128?

 A: 2, 3, 7, 277, 397

Why are those the prime factors of the number 166,273,128?

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 166,273,128

166,273,128
Factor Arrows
283,136,564
Factor Arrows
241,568,282
Factor Arrows
220,784,141
Factor Arrows
36,928,047
Factor Arrows
32,309,349
Factor Arrows
3769,783
Factor Arrows
7109,969
Factor Arrows
277397

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, 7, 277, 397

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 7 x 277 x 397 = 166,273,128

This can also be written as 23 x 33 x 71 x 2771 x 3971 = 166,273,128

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


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