Q: What are the prime factors of the number 261,184?

 A: 2, 7, 11, 53

Why are those the prime factors of the number 261,184?

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 261,184

261,184
Factor Arrows
2130,592
Factor Arrows
265,296
Factor Arrows
232,648
Factor Arrows
216,324
Factor Arrows
28,162
Factor Arrows
24,081
Factor Arrows
7583
Factor Arrows
1153

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, 7, 11, 53

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 7 x 11 x 53 = 261,184

This can also be written as 26 x 71 x 111 x 531 = 261,184

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


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