Q: What are the prime factors of the number 3,305,520?

 A: 2, 3, 5, 4591

Why are those the prime factors of the number 3,305,520?

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 3,305,520

3,305,520
Factor Arrows
21,652,760
Factor Arrows
2826,380
Factor Arrows
2413,190
Factor Arrows
2206,595
Factor Arrows
368,865
Factor Arrows
322,955
Factor Arrows
54,591

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, 4591

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 5 x 4,591 = 3,305,520

This can also be written as 24 x 32 x 51 x 4,5911 = 3,305,520

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


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