Q: What are the prime factors of the number 43,418,340?

 A: 2, 3, 5, 7, 17, 2027

Why are those the prime factors of the number 43,418,340?

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 43,418,340

43,418,340
Factor Arrows
221,709,170
Factor Arrows
210,854,585
Factor Arrows
33,618,195
Factor Arrows
31,206,065
Factor Arrows
5241,213
Factor Arrows
734,459
Factor Arrows
172,027

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, 5, 7, 17, 2027

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 7 x 17 x 2,027 = 43,418,340

This can also be written as 22 x 32 x 51 x 71 x 171 x 2,0271 = 43,418,340

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


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