A perfect square has an odd number of factors.
Factors of numbers always come in pairs -- except for perfect squares. Since the square root of a perfect square is listed only once on the list of factors, it results in a list with an odd number of factors.
all perfect square numbers
Square numbers have an odd number of factors.
Perfect squares are numbers with an odd number of factors.
A square number, because its square root is paired with itself.
Square numbers have an odd number of factors, but beyond that, any odd number can be a factor.
Square numbers have an odd number of factors.
A perfect square has an odd number of factors.
Both odd and even numbers may have odd numbers as factors.
A square number.
A perfect square.
A perfect square.
A square number.
Square numbers have odd numbers of factors. Examples: 4, 9, 16
Square numbers have an odd number of factors.
A perfect square
Square numbers
square numbers