Q: What are the prime factors of the number 19,011,564?

 A: 2, 3, 11, 13, 1231

Why are those the prime factors of the number 19,011,564?

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 19,011,564

19,011,564
Factor Arrows
29,505,782
Factor Arrows
24,752,891
Factor Arrows
31,584,297
Factor Arrows
3528,099
Factor Arrows
3176,033
Factor Arrows
1116,003
Factor Arrows
131,231

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, 11, 13, 1231

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 11 x 13 x 1,231 = 19,011,564

This can also be written as 22 x 33 x 111 x 131 x 1,2311 = 19,011,564

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


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