Q: What are the prime factors of the number 18,899,760?

 A: 2, 3, 5, 11, 7159

Why are those the prime factors of the number 18,899,760?

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 18,899,760

18,899,760
Factor Arrows
29,449,880
Factor Arrows
24,724,940
Factor Arrows
22,362,470
Factor Arrows
21,181,235
Factor Arrows
3393,745
Factor Arrows
578,749
Factor Arrows
117,159

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, 11, 7159

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 11 x 7,159 = 18,899,760

This can also be written as 24 x 31 x 51 x 111 x 7,1591 = 18,899,760

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


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