Q: What are the prime factors of the number 166,873,465?

 A: 5, 11, 31, 97, 1009

Why are those the prime factors of the number 166,873,465?

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 166,873,465

166,873,465
Factor Arrows
533,374,693
Factor Arrows
113,034,063
Factor Arrows
3197,873
Factor Arrows
971,009

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:

5, 11, 31, 97, 1009

We can check our work by multiplying all of the prime factors together: 5 x 11 x 31 x 97 x 1,009 = 166,873,465

This can also be written as 51 x 111 x 311 x 971 x 1,0091 = 166,873,465

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


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