Q: What are the prime factors of the number 3,104,640?

 A: 2, 3, 5, 7, 11

Why are those the prime factors of the number 3,104,640?

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 3,104,640

3,104,640
Factor Arrows
21,552,320
Factor Arrows
2776,160
Factor Arrows
2388,080
Factor Arrows
2194,040
Factor Arrows
297,020
Factor Arrows
248,510
Factor Arrows
224,255
Factor Arrows
38,085
Factor Arrows
32,695
Factor Arrows
5539
Factor Arrows
777
Factor Arrows
711

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, 11

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 3 x 5 x 7 x 7 x 11 = 3,104,640

This can also be written as 27 x 32 x 51 x 72 x 111 = 3,104,640

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


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