Q: What are the prime factors of the number 261,365,103?

 A: 3, 59, 164071

Why are those the prime factors of the number 261,365,103?

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 261,365,103

261,365,103
Factor Arrows
387,121,701
Factor Arrows
329,040,567
Factor Arrows
39,680,189
Factor Arrows
59164,071

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:

3, 59, 164071

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 59 x 164,071 = 261,365,103

This can also be written as 33 x 591 x 164,0711 = 261,365,103

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


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