Q: What are the prime factors of the number 11,866,624?

 A: 2, 7, 11, 43

Why are those the prime factors of the number 11,866,624?

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 11,866,624

11,866,624
Factor Arrows
25,933,312
Factor Arrows
22,966,656
Factor Arrows
21,483,328
Factor Arrows
2741,664
Factor Arrows
2370,832
Factor Arrows
2185,416
Factor Arrows
292,708
Factor Arrows
246,354
Factor Arrows
223,177
Factor Arrows
73,311
Factor Arrows
7473
Factor Arrows
1143

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, 7, 11, 43

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 2 x 7 x 7 x 11 x 43 = 11,866,624

This can also be written as 29 x 72 x 111 x 431 = 11,866,624

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


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