Q: What are the prime factors of the number 2,411,520?

 A: 2, 3, 5, 157

Why are those the prime factors of the number 2,411,520?

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 2,411,520

2,411,520
Factor Arrows
21,205,760
Factor Arrows
2602,880
Factor Arrows
2301,440
Factor Arrows
2150,720
Factor Arrows
275,360
Factor Arrows
237,680
Factor Arrows
218,840
Factor Arrows
29,420
Factor Arrows
24,710
Factor Arrows
22,355
Factor Arrows
3785
Factor Arrows
5157

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, 157

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 3 x 5 x 157 = 2,411,520

This can also be written as 210 x 31 x 51 x 1571 = 2,411,520

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


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