Q: What are the prime factors of the number 6,401,216?

 A: 2, 100019

Why are those the prime factors of the number 6,401,216?

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 6,401,216

6,401,216
Factor Arrows
23,200,608
Factor Arrows
21,600,304
Factor Arrows
2800,152
Factor Arrows
2400,076
Factor Arrows
2200,038
Factor Arrows
2100,019

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, 100019

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 100,019 = 6,401,216

This can also be written as 26 x 100,0191 = 6,401,216

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


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