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Square numbers have an odd number of factors, all others have an even number. In this context, primes can either be considered as having 0 factors (an even number) or 2 factors - 1 and itself, again, an even number.
No, only square numbers have an odd number of factors.
if the factors are equal the the number must be a square so the factor is the square root.
It depends on the number that it is a perfect square of!
Square numbers have an odd number of factors.