Q: What are the prime factors of the number 18,758,016?

 A: 2, 3, 19, 857

Why are those the prime factors of the number 18,758,016?

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 18,758,016

18,758,016
Factor Arrows
29,379,008
Factor Arrows
24,689,504
Factor Arrows
22,344,752
Factor Arrows
21,172,376
Factor Arrows
2586,188
Factor Arrows
2293,094
Factor Arrows
2146,547
Factor Arrows
348,849
Factor Arrows
316,283
Factor Arrows
19857

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, 19, 857

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 19 x 857 = 18,758,016

This can also be written as 27 x 32 x 191 x 8571 = 18,758,016

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


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