Q: What are the prime factors of the number 139,656?

 A: 2, 3, 11, 23

Why are those the prime factors of the number 139,656?

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 139,656

139,656
Factor Arrows
269,828
Factor Arrows
234,914
Factor Arrows
217,457
Factor Arrows
35,819
Factor Arrows
11529
Factor Arrows
2323

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, 11, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 11 x 23 x 23 = 139,656

This can also be written as 23 x 31 x 111 x 232 = 139,656

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


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