Q: What are the prime factors of the number 28,561,224?

 A: 2, 3, 17, 70003

Why are those the prime factors of the number 28,561,224?

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 28,561,224

28,561,224
Factor Arrows
214,280,612
Factor Arrows
27,140,306
Factor Arrows
23,570,153
Factor Arrows
31,190,051
Factor Arrows
1770,003

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, 17, 70003

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 17 x 70,003 = 28,561,224

This can also be written as 23 x 31 x 171 x 70,0031 = 28,561,224

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


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