Factors / Factors of 139

Factors of 139

1, 139

139 is prime: only factor pair is (1, 139), confirmed by trial division up to √139 ≈ 11.8 turning up nothing else. 139's full pair list is (1, 139), for 2 divisors in total. 139's divisors other than 139 itself sum to just 1, 138 below 139: the common deficient case. 139 is odd, digit sum 13 for 139; none of 2-12 divide 139 evenly. 139 has 2 divisors; 138 has 8 and 140 has 12, so 140 wins here. 139 divided by its largest divisor, 1, gives 139.