Factors / Factors of 39

Factors of 39

1, 3, 13, 39

39 breaks into 2 pairs, tested up to √39 ≈ 6.2; each pair multiplies back to 39 exactly. 39's full pair list is (1, 39), (3, 13), for 4 divisors in total. 39's divisors other than 39 itself sum to just 17, 22 below 39: the common deficient case. 39 is odd, digit sum 12 for 39; small divisors of 39 include 3. 39 has 4 divisors; 38 has 4 and 40 has 8, so 40 wins here. 39 divided by its largest divisor, 13, gives 3.