Q: What are the prime factors of the number 130,816?

 A: 2, 7, 73

Why are those the prime factors of the number 130,816?

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 130,816

130,816
Factor Arrows
265,408
Factor Arrows
232,704
Factor Arrows
216,352
Factor Arrows
28,176
Factor Arrows
24,088
Factor Arrows
22,044
Factor Arrows
21,022
Factor Arrows
2511
Factor Arrows
773

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, 7, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 73 = 130,816

This can also be written as 28 x 71 x 731 = 130,816

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


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