Q: What are the prime factors of the number 19,741,392?

 A: 2, 3, 11, 103

Why are those the prime factors of the number 19,741,392?

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 19,741,392

19,741,392
Factor Arrows
29,870,696
Factor Arrows
24,935,348
Factor Arrows
22,467,674
Factor Arrows
21,233,837
Factor Arrows
3411,279
Factor Arrows
3137,093
Factor Arrows
1112,463
Factor Arrows
111,133
Factor Arrows
11103

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, 103

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 11 x 11 x 11 x 103 = 19,741,392

This can also be written as 24 x 32 x 113 x 1031 = 19,741,392

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


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