Q: What are the prime factors of the number 14,121,120?

 A: 2, 3, 5, 13, 31, 73

Why are those the prime factors of the number 14,121,120?

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 14,121,120

14,121,120
Factor Arrows
27,060,560
Factor Arrows
23,530,280
Factor Arrows
21,765,140
Factor Arrows
2882,570
Factor Arrows
2441,285
Factor Arrows
3147,095
Factor Arrows
529,419
Factor Arrows
132,263
Factor Arrows
3173

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, 13, 31, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 13 x 31 x 73 = 14,121,120

This can also be written as 25 x 31 x 51 x 131 x 311 x 731 = 14,121,120

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


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