2, 3, 4 and 6
No, no prime number has proper factors.
1, 2, 4, 5, 10, 20
24 has eight factors, which means it has six proper factors.
That is one definition of the set of proper factors.
No. Some proper factors are prime.
The proper factors of 220 are 2,4,5,10,11,20,22,44,55,110
All factors are whole numbers
The proper factors of 14 are 1, 2, and 7.
The factors of 97 are 1 and 97. Prime numbers don't have "proper" factors.
Since 300 is a factor of 600, all of its factors are common.
5 is a prime number so it doesn't have proper factors
1, 5, 7, and 35 are the factors of 35. The proper factors are 5 and 7.
All numbers are factors (of their multiples).
Proper factors are the set of all the factors minus 1 and the number you are factoring.
41 is prime, therefore the factors are 1 and 41. Prime numbers don't have "proper" factors.
Zero. 5 is a prime so its only factors are 1 and 5. It, therefore, has no proper factors.