Q: What are the prime factors of the number 261,571,050?

 A: 2, 3, 5, 13, 61, 733

Why are those the prime factors of the number 261,571,050?

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 261,571,050

261,571,050
Factor Arrows
2130,785,525
Factor Arrows
343,595,175
Factor Arrows
314,531,725
Factor Arrows
52,906,345
Factor Arrows
5581,269
Factor Arrows
1344,713
Factor Arrows
61733

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, 13, 61, 733

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 5 x 13 x 61 x 733 = 261,571,050

This can also be written as 21 x 32 x 52 x 131 x 611 x 7331 = 261,571,050

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


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