Factors / Factors of 251

Factors of 251

1, 251

251 is prime: only factor pair is (1, 251), confirmed by trial division up to √251 ≈ 15.8 turning up nothing else. 251's full pair list is (1, 251), for 2 divisors in total. 251's divisors other than 251 itself sum to just 1, 250 below 251: the common deficient case. 251 is odd, digit sum 8 for 251; none of 2-12 divide 251 evenly. 251 has 2 divisors; 250 has 8 and 252 has 18, so 252 wins here. 251 divided by its largest divisor, 1, gives 251.