Q: What are the prime factors of the number 261,137,763?

 A: 3, 1074641

Why are those the prime factors of the number 261,137,763?

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 261,137,763

261,137,763
Factor Arrows
387,045,921
Factor Arrows
329,015,307
Factor Arrows
39,671,769
Factor Arrows
33,223,923
Factor Arrows
31,074,641

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, 1074641

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 1,074,641 = 261,137,763

This can also be written as 35 x 1,074,6411 = 261,137,763

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


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