Q: What are the prime factors of the number 166,878,540?

 A: 2, 3, 5, 103, 9001

Why are those the prime factors of the number 166,878,540?

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 166,878,540

166,878,540
Factor Arrows
283,439,270
Factor Arrows
241,719,635
Factor Arrows
313,906,545
Factor Arrows
34,635,515
Factor Arrows
5927,103
Factor Arrows
1039,001

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, 5, 103, 9001

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 103 x 9,001 = 166,878,540

This can also be written as 22 x 32 x 51 x 1031 x 9,0011 = 166,878,540

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


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