Q: What are the prime factors of the number 20,414,144?

 A: 2, 17, 29, 647

Why are those the prime factors of the number 20,414,144?

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 20,414,144

20,414,144
Factor Arrows
210,207,072
Factor Arrows
25,103,536
Factor Arrows
22,551,768
Factor Arrows
21,275,884
Factor Arrows
2637,942
Factor Arrows
2318,971
Factor Arrows
1718,763
Factor Arrows
29647

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, 17, 29, 647

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 17 x 29 x 647 = 20,414,144

This can also be written as 26 x 171 x 291 x 6471 = 20,414,144

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


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