Factors / Factors of 523

Factors of 523

1, 523

523 is prime: only factor pair is (1, 523), confirmed by trial division up to √523 ≈ 22.9 turning up nothing else. 523's full pair list is (1, 523), for 2 divisors in total. 523's divisors other than 523 itself sum to just 1, 522 below 523: the common deficient case. 523 is odd, digit sum 10 for 523; none of 2-12 divide 523 evenly. 523 has 2 divisors; 522 has 12 and 524 has 6, so 522 wins here. 523 divided by its largest divisor, 1, gives 523.