Q: What are the prime factors of the number 28,805,360?

 A: 2, 5, 47, 163

Why are those the prime factors of the number 28,805,360?

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 28,805,360

28,805,360
Factor Arrows
214,402,680
Factor Arrows
27,201,340
Factor Arrows
23,600,670
Factor Arrows
21,800,335
Factor Arrows
5360,067
Factor Arrows
477,661
Factor Arrows
47163

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, 47, 163

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 47 x 47 x 163 = 28,805,360

This can also be written as 24 x 51 x 472 x 1631 = 28,805,360

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


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