Q: What are the prime factors of the number 11,990,784?

 A: 2, 3, 13, 1201

Why are those the prime factors of the number 11,990,784?

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 11,990,784

11,990,784
Factor Arrows
25,995,392
Factor Arrows
22,997,696
Factor Arrows
21,498,848
Factor Arrows
2749,424
Factor Arrows
2374,712
Factor Arrows
2187,356
Factor Arrows
293,678
Factor Arrows
246,839
Factor Arrows
315,613
Factor Arrows
131,201

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, 13, 1201

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 2 x 3 x 13 x 1,201 = 11,990,784

This can also be written as 28 x 31 x 131 x 1,2011 = 11,990,784

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


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