Q: What are the prime factors of the number 261,610,545?

 A: 3, 5, 7, 41, 67, 907

Why are those the prime factors of the number 261,610,545?

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 261,610,545

261,610,545
Factor Arrows
387,203,515
Factor Arrows
517,440,703
Factor Arrows
72,491,529
Factor Arrows
4160,769
Factor Arrows
67907

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, 5, 7, 41, 67, 907

We can check our work by multiplying all of the prime factors together: 3 x 5 x 7 x 41 x 67 x 907 = 261,610,545

This can also be written as 31 x 51 x 71 x 411 x 671 x 9071 = 261,610,545

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


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