Zero doesn't have any proper factors.
Every number is a factor of 0. However, 0 has no proper factors since no two numbers that are non-zero can multiply to give 0.
In the context of primes and factoriation, every counting number is a factor.
No. Some proper factors are prime.
No, no prime number has proper factors.
1 doesn't have proper factors.
One has no proper factors.
0 has no factors.
The proper factors of 26 are 2 and 13
Prime numbers don't have proper factors.
The proper factors of 35 are 5 and 7.
Prime numbers don't have proper factors.
The proper factors of 220 are 2,4,5,10,11,20,22,44,55,110