Q: What are the prime factors of the number 166,402,656?

 A: 2, 3, 7, 59, 1399

Why are those the prime factors of the number 166,402,656?

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 166,402,656

166,402,656
Factor Arrows
283,201,328
Factor Arrows
241,600,664
Factor Arrows
220,800,332
Factor Arrows
210,400,166
Factor Arrows
25,200,083
Factor Arrows
31,733,361
Factor Arrows
3577,787
Factor Arrows
782,541
Factor Arrows
591,399

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, 59, 1399

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 7 x 59 x 1,399 = 166,402,656

This can also be written as 25 x 32 x 71 x 591 x 1,3991 = 166,402,656

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


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