Factors / Factors of 503

Factors of 503

1, 503

503 is prime: only factor pair is (1, 503), confirmed by trial division up to √503 ≈ 22.4 turning up nothing else. 503's full pair list is (1, 503), for 2 divisors in total. 503's divisors other than 503 itself sum to just 1, 502 below 503: the common deficient case. 503 is odd, digit sum 8 for 503; none of 2-12 divide 503 evenly. 503 has 2 divisors; 502 has 4 and 504 has 24, so 504 wins here. 503 divided by its largest divisor, 1, gives 503.