Q: What are the prime factors of the number 987,543,245?

 A: 5, 13, 379, 40087

Why are those the prime factors of the number 987,543,245?

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 987,543,245

987,543,245
Factor Arrows
5197,508,649
Factor Arrows
1315,192,973
Factor Arrows
37940,087

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:

5, 13, 379, 40087

We can check our work by multiplying all of the prime factors together: 5 x 13 x 379 x 40,087 = 987,543,245

This can also be written as 51 x 131 x 3791 x 40,0871 = 987,543,245

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


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