"Factors come in pairs, so this is impossible." This statement is false. A number can have an odd number of factors by having the square root as one of the factors. Find a number with 12 factors and a square root.
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13 is a prime number: its only factors are 1 and 13.
I believe you are thinking of a prime number. Ex. The factors of 2 are 1 and 2. The factors of 13 are 1 and 13.
13 is a Prime number whose only factors are itself and one
The factors of 13 are 1 and 13 because it's a prime number
13 is a prime number so the only factors are 1 and itself. Prime numbers have no proper factors.