Q: What are the prime factors of the number 20,324,224?

 A: 2, 19, 61, 137

Why are those the prime factors of the number 20,324,224?

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 20,324,224

20,324,224
Factor Arrows
210,162,112
Factor Arrows
25,081,056
Factor Arrows
22,540,528
Factor Arrows
21,270,264
Factor Arrows
2635,132
Factor Arrows
2317,566
Factor Arrows
2158,783
Factor Arrows
198,357
Factor Arrows
61137

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, 19, 61, 137

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 19 x 61 x 137 = 20,324,224

This can also be written as 27 x 191 x 611 x 1371 = 20,324,224

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


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