Q: What are the prime factors of the number 261,501,152?

 A: 2, 11, 53, 107, 131

Why are those the prime factors of the number 261,501,152?

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 261,501,152

261,501,152
Factor Arrows
2130,750,576
Factor Arrows
265,375,288
Factor Arrows
232,687,644
Factor Arrows
216,343,822
Factor Arrows
28,171,911
Factor Arrows
11742,901
Factor Arrows
5314,017
Factor Arrows
107131

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, 11, 53, 107, 131

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 53 x 107 x 131 = 261,501,152

This can also be written as 25 x 111 x 531 x 1071 x 1311 = 261,501,152

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


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