1 and 3
No.
94,143,178,827 has 24 factors.
I don't know if it's the smallest, but 94,143,178,827 has 24 factors.
Square numbers, like 49, have an odd number of factors.
Factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24
Square numbers have an odd number of factors. 1, 4, 9, 16...
1 + 3 + 5 + 15 = 24
Yes. Square numbers have an odd number of factors. 49 has three factors.
Square numbers have an odd number of factors.
Yes, the factors of all odd numbers are 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.