Q: What are the prime factors of the number 11,228,800?

 A: 2, 5, 11, 29

Why are those the prime factors of the number 11,228,800?

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 11,228,800

11,228,800
Factor Arrows
25,614,400
Factor Arrows
22,807,200
Factor Arrows
21,403,600
Factor Arrows
2701,800
Factor Arrows
2350,900
Factor Arrows
2175,450
Factor Arrows
287,725
Factor Arrows
517,545
Factor Arrows
53,509
Factor Arrows
11319
Factor Arrows
1129

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, 5, 11, 29

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 5 x 5 x 11 x 11 x 29 = 11,228,800

This can also be written as 27 x 52 x 112 x 291 = 11,228,800

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


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