21. Its factors are 1, 3, 7 and 21 which add to 32.
A prime number has exactly two factors, 1 and the number itself.
Yes. Square numbers have an odd number of factors. 49 has three factors.
Square numbers have an odd number of factors.
All odd numbers have odd factors.
Odd.
Square numbers have an odd number of factors.
A prime number has exactly two factors, 1 and the number itself.
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
27
105
105 is one such number.
45
3*5*7*9 = 945 ...check if any number less than that has exactly four distinct factors.
Square numbers have an odd number of factors.
Square numbers have an odd number of factors.
Yes, quare numbers have an odd number of factors.
Yes. Square numbers have an odd number of factors. 49 has three factors.