Factors / Factors of 197

Factors of 197

1, 197

197 is prime: only factor pair is (1, 197), confirmed by trial division up to √197 ≈ 14.0 turning up nothing else. 197's full pair list is (1, 197), for 2 divisors in total. 197's divisors other than 197 itself sum to just 1, 196 below 197: the common deficient case. 197 is odd, digit sum 17 for 197; none of 2-12 divide 197 evenly. 197 has 2 divisors; 196 has 9 and 198 has 12, so 198 wins here. 197 divided by its largest divisor, 1, gives 197.