Q: What are the prime factors of the number 45,018,666?

 A: 2, 3, 7, 11, 401

Why are those the prime factors of the number 45,018,666?

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 45,018,666

45,018,666
Factor Arrows
222,509,333
Factor Arrows
37,503,111
Factor Arrows
32,501,037
Factor Arrows
3833,679
Factor Arrows
3277,893
Factor Arrows
392,631
Factor Arrows
330,877
Factor Arrows
74,411
Factor Arrows
11401

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, 7, 11, 401

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 7 x 11 x 401 = 45,018,666

This can also be written as 21 x 36 x 71 x 111 x 4011 = 45,018,666

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


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