Factors / Factors of 131

Factors of 131

1, 131

131 is prime: only factor pair is (1, 131), confirmed by trial division up to √131 ≈ 11.4 turning up nothing else. 131's full pair list is (1, 131), for 2 divisors in total. 131's divisors other than 131 itself sum to just 1, 130 below 131: the common deficient case. 131 is odd, digit sum 5 for 131; none of 2-12 divide 131 evenly. 131 has 2 divisors; 130 has 8 and 132 has 12, so 132 wins here. 131 divided by its largest divisor, 1, gives 131.