Factors / Factors of 11

Factors of 11

1, 11

11 is prime: only factor pair is (1, 11), confirmed by trial division up to √11 ≈ 3.3 turning up nothing else. 11's full pair list is (1, 11), for 2 divisors in total. 11's divisors other than 11 itself sum to just 1, 10 below 11: the common deficient case. 11 is odd, digit sum 2 for 11; none of 2-12 divide 11 evenly. 11 has 2 divisors; 10 has 4 and 12 has 6, so 12 wins here. 11 divided by its largest divisor, 1, gives 11.