Q: What are the prime factors of the number 19,254,400?

 A: 2, 5, 11, 547

Why are those the prime factors of the number 19,254,400?

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 19,254,400

19,254,400
Factor Arrows
29,627,200
Factor Arrows
24,813,600
Factor Arrows
22,406,800
Factor Arrows
21,203,400
Factor Arrows
2601,700
Factor Arrows
2300,850
Factor Arrows
2150,425
Factor Arrows
530,085
Factor Arrows
56,017
Factor Arrows
11547

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, 11, 547

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 5 x 5 x 11 x 547 = 19,254,400

This can also be written as 27 x 52 x 111 x 5471 = 19,254,400

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


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