Q: What are the prime factors of the number 118,220,850?

 A: 2, 3, 5, 11, 19, 419

Why are those the prime factors of the number 118,220,850?

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 118,220,850

118,220,850
Factor Arrows
259,110,425
Factor Arrows
319,703,475
Factor Arrows
36,567,825
Factor Arrows
32,189,275
Factor Arrows
5437,855
Factor Arrows
587,571
Factor Arrows
117,961
Factor Arrows
19419

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, 11, 19, 419

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 5 x 11 x 19 x 419 = 118,220,850

This can also be written as 21 x 33 x 52 x 111 x 191 x 4191 = 118,220,850

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


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