Q: What are the prime factors of the number 118,631,520?

 A: 2, 3, 5, 7, 3923

Why are those the prime factors of the number 118,631,520?

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 118,631,520

118,631,520
Factor Arrows
259,315,760
Factor Arrows
229,657,880
Factor Arrows
214,828,940
Factor Arrows
27,414,470
Factor Arrows
23,707,235
Factor Arrows
31,235,745
Factor Arrows
3411,915
Factor Arrows
3137,305
Factor Arrows
527,461
Factor Arrows
73,923

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, 5, 7, 3923

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 3 x 5 x 7 x 3,923 = 118,631,520

This can also be written as 25 x 33 x 51 x 71 x 3,9231 = 118,631,520

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


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