Q: What are the prime factors of the number 166,943,860?

 A: 2, 5, 991, 8423

Why are those the prime factors of the number 166,943,860?

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 166,943,860

166,943,860
Factor Arrows
283,471,930
Factor Arrows
241,735,965
Factor Arrows
58,347,193
Factor Arrows
9918,423

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, 5, 991, 8423

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 991 x 8,423 = 166,943,860

This can also be written as 22 x 51 x 9911 x 8,4231 = 166,943,860

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


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