Q: What are the prime factors of the number 18,853,510?

 A: 2, 5, 13, 17, 19, 449

Why are those the prime factors of the number 18,853,510?

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 18,853,510

18,853,510
Factor Arrows
29,426,755
Factor Arrows
51,885,351
Factor Arrows
13145,027
Factor Arrows
178,531
Factor Arrows
19449

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, 5, 13, 17, 19, 449

We can check our work by multiplying all of the prime factors together: 2 x 5 x 13 x 17 x 19 x 449 = 18,853,510

This can also be written as 21 x 51 x 131 x 171 x 191 x 4491 = 18,853,510

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


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