Q: What are the prime factors of the number 2,779,434?

 A: 2, 3, 7, 19, 43

Why are those the prime factors of the number 2,779,434?

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 2,779,434

2,779,434
Factor Arrows
21,389,717
Factor Arrows
3463,239
Factor Arrows
3154,413
Factor Arrows
351,471
Factor Arrows
317,157
Factor Arrows
35,719
Factor Arrows
7817
Factor Arrows
1943

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, 7, 19, 43

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 7 x 19 x 43 = 2,779,434

This can also be written as 21 x 35 x 71 x 191 x 431 = 2,779,434

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


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