Q: What are the prime factors of the number 1,505,580?

 A: 2, 3, 5, 23, 1091

Why are those the prime factors of the number 1,505,580?

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 1,505,580

1,505,580
Factor Arrows
2752,790
Factor Arrows
2376,395
Factor Arrows
3125,465
Factor Arrows
525,093
Factor Arrows
231,091

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, 23, 1091

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 23 x 1,091 = 1,505,580

This can also be written as 22 x 31 x 51 x 231 x 1,0911 = 1,505,580

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


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