Q: What are the prime factors of the number 261,180,560?

 A: 2, 5, 251, 13007

Why are those the prime factors of the number 261,180,560?

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 261,180,560

261,180,560
Factor Arrows
2130,590,280
Factor Arrows
265,295,140
Factor Arrows
232,647,570
Factor Arrows
216,323,785
Factor Arrows
53,264,757
Factor Arrows
25113,007

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, 251, 13007

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 251 x 13,007 = 261,180,560

This can also be written as 24 x 51 x 2511 x 13,0071 = 261,180,560

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


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