Factors / Factors of 85

Factors of 85

1, 5, 17, 85

85 breaks into 2 pairs, tested up to √85 ≈ 9.2; each pair multiplies back to 85 exactly. 85's full pair list is (1, 85), (5, 17), for 4 divisors in total. 85's divisors other than 85 itself sum to just 23, 62 below 85: the common deficient case. 85 is odd, digit sum 13 for 85; small divisors of 85 include 5. 85 has 4 divisors; 84 has 12 and 86 has 4, so 84 wins here. 85 divided by its largest divisor, 17, gives 5.