Q: What are the prime factors of the number 28,178,912?

 A: 2, 167, 5273

Why are those the prime factors of the number 28,178,912?

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 28,178,912

28,178,912
Factor Arrows
214,089,456
Factor Arrows
27,044,728
Factor Arrows
23,522,364
Factor Arrows
21,761,182
Factor Arrows
2880,591
Factor Arrows
1675,273

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, 167, 5273

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 167 x 5,273 = 28,178,912

This can also be written as 25 x 1671 x 5,2731 = 28,178,912

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


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