Q: What are the prime factors of the number 133,104,816?

 A: 2, 3, 13, 137, 173

Why are those the prime factors of the number 133,104,816?

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 133,104,816

133,104,816
Factor Arrows
266,552,408
Factor Arrows
233,276,204
Factor Arrows
216,638,102
Factor Arrows
28,319,051
Factor Arrows
32,773,017
Factor Arrows
3924,339
Factor Arrows
3308,113
Factor Arrows
1323,701
Factor Arrows
137173

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, 13, 137, 173

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 13 x 137 x 173 = 133,104,816

This can also be written as 24 x 33 x 131 x 1371 x 1731 = 133,104,816

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


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