Q: What are the prime factors of the number 45,111,552?

 A: 2, 3, 151, 389

Why are those the prime factors of the number 45,111,552?

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 45,111,552

45,111,552
Factor Arrows
222,555,776
Factor Arrows
211,277,888
Factor Arrows
25,638,944
Factor Arrows
22,819,472
Factor Arrows
21,409,736
Factor Arrows
2704,868
Factor Arrows
2352,434
Factor Arrows
2176,217
Factor Arrows
358,739
Factor Arrows
151389

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, 151, 389

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 3 x 151 x 389 = 45,111,552

This can also be written as 28 x 31 x 1511 x 3891 = 45,111,552

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


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