Q: What are the prime factors of the number 2,202,240?

 A: 2, 3, 5, 31, 37

Why are those the prime factors of the number 2,202,240?

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 2,202,240

2,202,240
Factor Arrows
21,101,120
Factor Arrows
2550,560
Factor Arrows
2275,280
Factor Arrows
2137,640
Factor Arrows
268,820
Factor Arrows
234,410
Factor Arrows
217,205
Factor Arrows
35,735
Factor Arrows
51,147
Factor Arrows
3137

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, 31, 37

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 3 x 5 x 31 x 37 = 2,202,240

This can also be written as 27 x 31 x 51 x 311 x 371 = 2,202,240

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


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