Q: What are the prime factors of the number 40,135,424?

 A: 2, 7, 22397

Why are those the prime factors of the number 40,135,424?

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 40,135,424

40,135,424
Factor Arrows
220,067,712
Factor Arrows
210,033,856
Factor Arrows
25,016,928
Factor Arrows
22,508,464
Factor Arrows
21,254,232
Factor Arrows
2627,116
Factor Arrows
2313,558
Factor Arrows
2156,779
Factor Arrows
722,397

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, 7, 22397

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 22,397 = 40,135,424

This can also be written as 28 x 71 x 22,3971 = 40,135,424

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


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