Q: What are the prime factors of the number 15,554,112?

 A: 2, 3, 7, 71, 163

Why are those the prime factors of the number 15,554,112?

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 15,554,112

15,554,112
Factor Arrows
27,777,056
Factor Arrows
23,888,528
Factor Arrows
21,944,264
Factor Arrows
2972,132
Factor Arrows
2486,066
Factor Arrows
2243,033
Factor Arrows
381,011
Factor Arrows
711,573
Factor Arrows
71163

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, 71, 163

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 7 x 71 x 163 = 15,554,112

This can also be written as 26 x 31 x 71 x 711 x 1631 = 15,554,112

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


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