Q: What are the prime factors of the number 11,223,450?

 A: 2, 3, 5, 7, 509

Why are those the prime factors of the number 11,223,450?

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 11,223,450

11,223,450
Factor Arrows
25,611,725
Factor Arrows
31,870,575
Factor Arrows
3623,525
Factor Arrows
5124,705
Factor Arrows
524,941
Factor Arrows
73,563
Factor Arrows
7509

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, 5, 7, 509

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 5 x 7 x 7 x 509 = 11,223,450

This can also be written as 21 x 32 x 52 x 72 x 5091 = 11,223,450

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


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