Q: What are the prime factors of the number 11,347,380?

 A: 2, 3, 5, 11, 521

Why are those the prime factors of the number 11,347,380?

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 11,347,380

11,347,380
Factor Arrows
25,673,690
Factor Arrows
22,836,845
Factor Arrows
3945,615
Factor Arrows
3315,205
Factor Arrows
563,041
Factor Arrows
115,731
Factor Arrows
11521

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, 11, 521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 11 x 11 x 521 = 11,347,380

This can also be written as 22 x 32 x 51 x 112 x 5211 = 11,347,380

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


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