Q: What are the prime factors of the number 13,422,400?

 A: 2, 5, 8389

Why are those the prime factors of the number 13,422,400?

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 13,422,400

13,422,400
Factor Arrows
26,711,200
Factor Arrows
23,355,600
Factor Arrows
21,677,800
Factor Arrows
2838,900
Factor Arrows
2419,450
Factor Arrows
2209,725
Factor Arrows
541,945
Factor Arrows
58,389

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, 8389

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 5 x 5 x 8,389 = 13,422,400

This can also be written as 26 x 52 x 8,3891 = 13,422,400

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


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