Q: What are the prime factors of the number 28,543,776?

 A: 2, 3, 19, 15649

Why are those the prime factors of the number 28,543,776?

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 28,543,776

28,543,776
Factor Arrows
214,271,888
Factor Arrows
27,135,944
Factor Arrows
23,567,972
Factor Arrows
21,783,986
Factor Arrows
2891,993
Factor Arrows
3297,331
Factor Arrows
1915,649

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, 19, 15649

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 19 x 15,649 = 28,543,776

This can also be written as 25 x 31 x 191 x 15,6491 = 28,543,776

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


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