Q: What are the prime factors of the number 11,858,784?

 A: 2, 3, 7, 2521

Why are those the prime factors of the number 11,858,784?

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 11,858,784

11,858,784
Factor Arrows
25,929,392
Factor Arrows
22,964,696
Factor Arrows
21,482,348
Factor Arrows
2741,174
Factor Arrows
2370,587
Factor Arrows
3123,529
Factor Arrows
717,647
Factor Arrows
72,521

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, 7, 2521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 7 x 2,521 = 11,858,784

This can also be written as 25 x 31 x 72 x 2,5211 = 11,858,784

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


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