Q: What are the prime factors of the number 18,907,344?

 A: 2, 3, 1621

Why are those the prime factors of the number 18,907,344?

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 18,907,344

18,907,344
Factor Arrows
29,453,672
Factor Arrows
24,726,836
Factor Arrows
22,363,418
Factor Arrows
21,181,709
Factor Arrows
3393,903
Factor Arrows
3131,301
Factor Arrows
343,767
Factor Arrows
314,589
Factor Arrows
34,863
Factor Arrows
31,621

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, 1621

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 3 x 3 x 3 x 1,621 = 18,907,344

This can also be written as 24 x 36 x 1,6211 = 18,907,344

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


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