Factors / Factors of 161

Factors of 161

1, 7, 23, 161

161 breaks into 2 pairs, tested up to √161 ≈ 12.7; each pair multiplies back to 161 exactly. 161's full pair list is (1, 161), (7, 23), for 4 divisors in total. 161's divisors other than 161 itself sum to just 31, 130 below 161: the common deficient case. 161 is odd, digit sum 8 for 161; small divisors of 161 include 7. 161 has 4 divisors; 160 has 12 and 162 has 10, so 160 wins here. 161 divided by its largest divisor, 23, gives 7.