Q: What are the prime factors of the number 987,543,249?

 A: 3, 7, 11, 23, 185873

Why are those the prime factors of the number 987,543,249?

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 987,543,249

987,543,249
Factor Arrows
3329,181,083
Factor Arrows
747,025,869
Factor Arrows
114,275,079
Factor Arrows
23185,873

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, 7, 11, 23, 185873

We can check our work by multiplying all of the prime factors together: 3 x 7 x 11 x 23 x 185,873 = 987,543,249

This can also be written as 31 x 71 x 111 x 231 x 185,8731 = 987,543,249

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


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