Q: What are the prime factors of the number 276,406,680?

 A: 2, 3, 5, 11, 19, 103, 107

Why are those the prime factors of the number 276,406,680?

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 276,406,680

276,406,680
Factor Arrows
2138,203,340
Factor Arrows
269,101,670
Factor Arrows
234,550,835
Factor Arrows
311,516,945
Factor Arrows
52,303,389
Factor Arrows
11209,399
Factor Arrows
1911,021
Factor Arrows
103107

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, 11, 19, 103, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 11 x 19 x 103 x 107 = 276,406,680

This can also be written as 23 x 31 x 51 x 111 x 191 x 1031 x 1071 = 276,406,680

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


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