Q: What are the prime factors of the number 2,986,560?

 A: 2, 3, 5, 17, 61

Why are those the prime factors of the number 2,986,560?

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 2,986,560

2,986,560
Factor Arrows
21,493,280
Factor Arrows
2746,640
Factor Arrows
2373,320
Factor Arrows
2186,660
Factor Arrows
293,330
Factor Arrows
246,665
Factor Arrows
315,555
Factor Arrows
35,185
Factor Arrows
51,037
Factor Arrows
1761

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, 17, 61

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 3 x 3 x 5 x 17 x 61 = 2,986,560

This can also be written as 26 x 32 x 51 x 171 x 611 = 2,986,560

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


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