Factors / Factors of 51

Factors of 51

1, 3, 17, 51

51 breaks into 2 pairs, tested up to √51 ≈ 7.1; each pair multiplies back to 51 exactly. 51's full pair list is (1, 51), (3, 17), for 4 divisors in total. 51's divisors other than 51 itself sum to just 21, 30 below 51: the common deficient case. 51 is odd, digit sum 6 for 51; small divisors of 51 include 3. 51 has 4 divisors; 50 has 6 and 52 has 6, so 50 wins here. 51 divided by its largest divisor, 17, gives 3.