Q: What are the prime factors of the number 2,205,056?

 A: 2, 7, 23, 107

Why are those the prime factors of the number 2,205,056?

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 2,205,056

2,205,056
Factor Arrows
21,102,528
Factor Arrows
2551,264
Factor Arrows
2275,632
Factor Arrows
2137,816
Factor Arrows
268,908
Factor Arrows
234,454
Factor Arrows
217,227
Factor Arrows
72,461
Factor Arrows
23107

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, 7, 23, 107

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 7 x 23 x 107 = 2,205,056

This can also be written as 27 x 71 x 231 x 1071 = 2,205,056

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


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