Q: What are the prime factors of the number 3,943,404?

 A: 2, 3, 4057

Why are those the prime factors of the number 3,943,404?

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 3,943,404

3,943,404
Factor Arrows
21,971,702
Factor Arrows
2985,851
Factor Arrows
3328,617
Factor Arrows
3109,539
Factor Arrows
336,513
Factor Arrows
312,171
Factor Arrows
34,057

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, 3, 4057

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 4,057 = 3,943,404

This can also be written as 22 x 35 x 4,0571 = 3,943,404

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


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