Q: What are the prime factors of the number 19,004,736?

 A: 2, 3, 31, 103

Why are those the prime factors of the number 19,004,736?

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 19,004,736

19,004,736
Factor Arrows
29,502,368
Factor Arrows
24,751,184
Factor Arrows
22,375,592
Factor Arrows
21,187,796
Factor Arrows
2593,898
Factor Arrows
2296,949
Factor Arrows
398,983
Factor Arrows
313,193
Factor Arrows
31103

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, 31, 103

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 3 x 31 x 31 x 103 = 19,004,736

This can also be written as 26 x 31 x 312 x 1031 = 19,004,736

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


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