Q: What are numbers with odd factors called?

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

Even numbers must have 2 amongst their factors; they may have other even numbers amongst their factors. Odd numbers must not; every factor of an odd number must be odd.

Even powers of prime numbers. Square numbers have an odd number of factors.

Square numbers have an odd number of factors.

Because 55 is an odd number. All the factors of odd numbers are odd.

Related questions

Square numbers have odd numbers of factors.

Yes, the factors of all odd numbers are odd numbers.

square numbers

Both odd and even numbers may have odd numbers as factors.

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

Perfect squares have an odd number of factors.

Square numbers have an odd number of factors.

Some even numbers have more factors than some odd numbers and some odd numbers have more factors than some even numbers. As a group, even numbers have more factors than odd numbers.

Some even numbers have more factors than some odd numbers and some odd numbers have more factors than some even numbers. As a group, even numbers have more factors than odd numbers.

All nonzero numbers have factors. Some factors are even numbers, some factors are odd numbers.

Square numbers have an odd number of factors.

Square numbers have an odd number of factors.