Q: What are the prime factors of the number 13,809,536?

 A: 2, 13, 43, 193

Why are those the prime factors of the number 13,809,536?

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 13,809,536

13,809,536
Factor Arrows
26,904,768
Factor Arrows
23,452,384
Factor Arrows
21,726,192
Factor Arrows
2863,096
Factor Arrows
2431,548
Factor Arrows
2215,774
Factor Arrows
2107,887
Factor Arrows
138,299
Factor Arrows
43193

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, 13, 43, 193

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 2 x 13 x 43 x 193 = 13,809,536

This can also be written as 27 x 131 x 431 x 1931 = 13,809,536

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


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