Q: What are the prime factors of the number 43,349,040?

 A: 2, 3, 5, 7, 47, 61

Why are those the prime factors of the number 43,349,040?

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 43,349,040

43,349,040
Factor Arrows
221,674,520
Factor Arrows
210,837,260
Factor Arrows
25,418,630
Factor Arrows
22,709,315
Factor Arrows
3903,105
Factor Arrows
3301,035
Factor Arrows
3100,345
Factor Arrows
520,069
Factor Arrows
72,867
Factor Arrows
4761

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, 47, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 7 x 47 x 61 = 43,349,040

This can also be written as 24 x 33 x 51 x 71 x 471 x 611 = 43,349,040

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


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