Q: What are the prime factors of the number 45,122,112?

 A: 2, 3, 7, 19, 31

Why are those the prime factors of the number 45,122,112?

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 45,122,112

45,122,112
Factor Arrows
222,561,056
Factor Arrows
211,280,528
Factor Arrows
25,640,264
Factor Arrows
22,820,132
Factor Arrows
21,410,066
Factor Arrows
2705,033
Factor Arrows
3235,011
Factor Arrows
378,337
Factor Arrows
711,191
Factor Arrows
19589
Factor Arrows
1931

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, 19, 31

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 3 x 3 x 7 x 19 x 19 x 31 = 45,122,112

This can also be written as 26 x 32 x 71 x 192 x 311 = 45,122,112

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


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