Just 15.
Just 15.
Yes, the factors of all odd numbers are odd numbers.
Square numbers have an odd number of factors. There are no square numbers in that range.
The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. The odd composite factor is 15.
1 + 3 + 5 + 15 = 24
No numbers in that range have an odd number of factors.
Just 15.
Just 15.
Yes, the factors of all odd numbers are odd numbers.
Because 55 is an odd number. All the factors of odd numbers are odd.
Square numbers have an odd number of factors. There are no square numbers in that range.
1 and 5 are the factors of 20 which are odd.
None of them.
45
48 has both even and odd factors.
All odd numbers have odd factors.