Factors / Factors of 431

Factors of 431

1, 431

431 is prime: only factor pair is (1, 431), confirmed by trial division up to √431 ≈ 20.8 turning up nothing else. 431's full pair list is (1, 431), for 2 divisors in total. 431's divisors other than 431 itself sum to just 1, 430 below 431: the common deficient case. 431 is odd, digit sum 8 for 431; none of 2-12 divide 431 evenly. 431 has 2 divisors; 430 has 8 and 432 has 20, so 432 wins here. 431 divided by its largest divisor, 1, gives 431.