Factors / Factors of 43

Factors of 43

1, 43

43 is prime: only factor pair is (1, 43), confirmed by trial division up to √43 ≈ 6.6 turning up nothing else. 43's full pair list is (1, 43), for 2 divisors in total. 43's divisors other than 43 itself sum to just 1, 42 below 43: the common deficient case. 43 is odd, digit sum 7 for 43; none of 2-12 divide 43 evenly. 43 has 2 divisors; 42 has 8 and 44 has 6, so 42 wins here. 43 divided by its largest divisor, 1, gives 43.