Q: What are the prime factors of the number 19,314,944?

 A: 2, 11, 19

Why are those the prime factors of the number 19,314,944?

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 19,314,944

19,314,944
Factor Arrows
29,657,472
Factor Arrows
24,828,736
Factor Arrows
22,414,368
Factor Arrows
21,207,184
Factor Arrows
2603,592
Factor Arrows
2301,796
Factor Arrows
2150,898
Factor Arrows
275,449
Factor Arrows
116,859
Factor Arrows
19361
Factor Arrows
1919

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, 11, 19

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 2 x 11 x 19 x 19 x 19 = 19,314,944

This can also be written as 28 x 111 x 193 = 19,314,944

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


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