Q: What are the prime factors of the number 16,661,312?

 A: 2, 29, 47, 191

Why are those the prime factors of the number 16,661,312?

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 16,661,312

16,661,312
Factor Arrows
28,330,656
Factor Arrows
24,165,328
Factor Arrows
22,082,664
Factor Arrows
21,041,332
Factor Arrows
2520,666
Factor Arrows
2260,333
Factor Arrows
298,977
Factor Arrows
47191

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, 29, 47, 191

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 29 x 47 x 191 = 16,661,312

This can also be written as 26 x 291 x 471 x 1911 = 16,661,312

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


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