Q: What are the prime factors of the number 40,157,824?

 A: 2, 7, 44819

Why are those the prime factors of the number 40,157,824?

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 40,157,824

40,157,824
Factor Arrows
220,078,912
Factor Arrows
210,039,456
Factor Arrows
25,019,728
Factor Arrows
22,509,864
Factor Arrows
21,254,932
Factor Arrows
2627,466
Factor Arrows
2313,733
Factor Arrows
744,819

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, 44819

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 7 x 44,819 = 40,157,824

This can also be written as 27 x 71 x 44,8191 = 40,157,824

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


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