Q: What are the prime factors of the number 12,005,162?

 A: 2, 13, 17, 157, 173

Why are those the prime factors of the number 12,005,162?

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 12,005,162

12,005,162
Factor Arrows
26,002,581
Factor Arrows
13461,737
Factor Arrows
1727,161
Factor Arrows
157173

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, 13, 17, 157, 173

We can check our work by multiplying all of the prime factors together: 2 x 13 x 17 x 157 x 173 = 12,005,162

This can also be written as 21 x 131 x 171 x 1571 x 1731 = 12,005,162

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


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