Factors / Factors of 157

Factors of 157

1, 157

157 is prime: only factor pair is (1, 157), confirmed by trial division up to √157 ≈ 12.5 turning up nothing else. 157's full pair list is (1, 157), for 2 divisors in total. 157's divisors other than 157 itself sum to just 1, 156 below 157: the common deficient case. 157 is odd, digit sum 13 for 157; none of 2-12 divide 157 evenly. 157 has 2 divisors; 156 has 12 and 158 has 4, so 156 wins here. 157 divided by its largest divisor, 1, gives 157.