Q: What are the prime factors of the number 15,530,400?

 A: 2, 3, 5, 719

Why are those the prime factors of the number 15,530,400?

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 15,530,400

15,530,400
Factor Arrows
27,765,200
Factor Arrows
23,882,600
Factor Arrows
21,941,300
Factor Arrows
2970,650
Factor Arrows
2485,325
Factor Arrows
3161,775
Factor Arrows
353,925
Factor Arrows
317,975
Factor Arrows
53,595
Factor Arrows
5719

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, 5, 719

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 719 = 15,530,400

This can also be written as 25 x 33 x 52 x 7191 = 15,530,400

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


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