Q: What are the prime factors of the number 5,857,280?

 A: 2, 5, 11, 13

Why are those the prime factors of the number 5,857,280?

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 5,857,280

5,857,280
Factor Arrows
22,928,640
Factor Arrows
21,464,320
Factor Arrows
2732,160
Factor Arrows
2366,080
Factor Arrows
2183,040
Factor Arrows
291,520
Factor Arrows
245,760
Factor Arrows
222,880
Factor Arrows
211,440
Factor Arrows
25,720
Factor Arrows
22,860
Factor Arrows
21,430
Factor Arrows
2715
Factor Arrows
5143
Factor Arrows
1113

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, 5, 11, 13

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 2 x 2 x 2 x 2 x 2 x 2 x 5 x 11 x 13 = 5,857,280

This can also be written as 213 x 51 x 111 x 131 = 5,857,280

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


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