Q: What are the prime factors of the number 19,127,320?

 A: 2, 5, 41, 107, 109

Why are those the prime factors of the number 19,127,320?

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 19,127,320

19,127,320
Factor Arrows
29,563,660
Factor Arrows
24,781,830
Factor Arrows
22,390,915
Factor Arrows
5478,183
Factor Arrows
4111,663
Factor Arrows
107109

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, 5, 41, 107, 109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 41 x 107 x 109 = 19,127,320

This can also be written as 23 x 51 x 411 x 1071 x 1091 = 19,127,320

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


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