Q: What are the prime factors of the number 28,780,556?

 A: 2, 7, 101, 10177

Why are those the prime factors of the number 28,780,556?

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 28,780,556

28,780,556
Factor Arrows
214,390,278
Factor Arrows
27,195,139
Factor Arrows
71,027,877
Factor Arrows
10110,177

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, 7, 101, 10177

We can check our work by multiplying all of the prime factors together: 2 x 2 x 7 x 101 x 10,177 = 28,780,556

This can also be written as 22 x 71 x 1011 x 10,1771 = 28,780,556

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


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