Factors / Factors of 263

Factors of 263

1, 263

263 is prime: only factor pair is (1, 263), confirmed by trial division up to √263 ≈ 16.2 turning up nothing else. 263's full pair list is (1, 263), for 2 divisors in total. 263's divisors other than 263 itself sum to just 1, 262 below 263: the common deficient case. 263 is odd, digit sum 11 for 263; none of 2-12 divide 263 evenly. 263 has 2 divisors; 262 has 4 and 264 has 16, so 264 wins here. 263 divided by its largest divisor, 1, gives 263.