Q: What are the prime factors of the number 11,105,328?

 A: 2, 3, 13, 37

Why are those the prime factors of the number 11,105,328?

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 11,105,328

11,105,328
Factor Arrows
25,552,664
Factor Arrows
22,776,332
Factor Arrows
21,388,166
Factor Arrows
2694,083
Factor Arrows
3231,361
Factor Arrows
1317,797
Factor Arrows
131,369
Factor Arrows
3737

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, 37

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 13 x 13 x 37 x 37 = 11,105,328

This can also be written as 24 x 31 x 132 x 372 = 11,105,328

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


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