Q: What are the prime factors of the number 3,928,144?

 A: 2, 11, 2029

Why are those the prime factors of the number 3,928,144?

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 3,928,144

3,928,144
Factor Arrows
21,964,072
Factor Arrows
2982,036
Factor Arrows
2491,018
Factor Arrows
2245,509
Factor Arrows
1122,319
Factor Arrows
112,029

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, 11, 2029

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 11 x 11 x 2,029 = 3,928,144

This can also be written as 24 x 112 x 2,0291 = 3,928,144

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


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