Q: What are the prime factors of the number 3,166,208?

 A: 2, 773

Why are those the prime factors of the number 3,166,208?

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 3,166,208

3,166,208
Factor Arrows
21,583,104
Factor Arrows
2791,552
Factor Arrows
2395,776
Factor Arrows
2197,888
Factor Arrows
298,944
Factor Arrows
249,472
Factor Arrows
224,736
Factor Arrows
212,368
Factor Arrows
26,184
Factor Arrows
23,092
Factor Arrows
21,546
Factor Arrows
2773

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, 773

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 2 x 2 x 2 x 2 x 2 x 773 = 3,166,208

This can also be written as 212 x 7731 = 3,166,208

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


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