Q: What are the prime factors of the number 108,705,360?

 A: 2, 3, 5, 23, 47, 419

Why are those the prime factors of the number 108,705,360?

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 108,705,360

108,705,360
Factor Arrows
254,352,680
Factor Arrows
227,176,340
Factor Arrows
213,588,170
Factor Arrows
26,794,085
Factor Arrows
32,264,695
Factor Arrows
5452,939
Factor Arrows
2319,693
Factor Arrows
47419

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, 23, 47, 419

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 23 x 47 x 419 = 108,705,360

This can also be written as 24 x 31 x 51 x 231 x 471 x 4191 = 108,705,360

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


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