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Q: What do you call a number with a odd number of factors?

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I would call an odd number factor a factor that is an odd number. I would call a number with an odd number of factors a perfect square.

A square number

A perfect square

Squares have an odd number of factors.

Square numbers have an odd number of factors.

Yes. Square numbers have an odd number of factors. 49 has three factors.

Square numbers have an odd number of factors.

if a number has an odd number of factors it would be a perfect square

if a number has an odd number of factors it would be a perfect square

Yes, quare numbers have an odd number of factors.

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.

Perfect squares are numbers with an odd number of factors.

Square numbers have an odd number of factors.

Square numbers have an odd number of factors.

Square numbers have an odd number of factors.

A perfect square has an odd number of factors.

Square numbers have an odd number of factors.

Square numbers have an odd number of factors.

No. The opposite is true: the gcf of an odd number and an even number is always odd. All the factors of an odd number are odd; or to put it another way: If a number has an even factor, the number itself must be even. Thus the only common factors between odd and even numbers must be odd.

a # that has exactly 2 factors is called a prime number, an example of a prime number is 17 because it is odd and it only has 2 factors, 17= 1 and itself

A perfect square has an odd number of distinct factors, because two of its factors are the same number.

All odd numbers have odd factors.

An even power. Square numbers have an odd number of factors.

Square numbers have an odd number of factors.