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.
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No, only square numbers have an odd number of factors.
Yes. Square numbers have an odd number of factors. 49 has three factors.
Even powers of prime numbers. Square numbers have an odd number of factors.
the answer is what ever number you choose you have to times it by itself to get a square number.
Square numbers have an odd number of factors.