Factors / Factors of 105

Factors of 105

1, 3, 5, 7, 15, 21, 35, 105

105 breaks into 4 pairs, tested up to √105 ≈ 10.2; each pair multiplies back to 105 exactly. 105's full pair list is (1, 105), (3, 35), (5, 21), (7, 15), for 8 divisors in total. 105's divisors other than 105 itself sum to just 87, 18 below 105: the common deficient case. 105 is odd, digit sum 6 for 105; small divisors of 105 include 3, 5, 7. 105 has 8 divisors; 104 has 8 and 106 has 4, so 104 wins here. 105 divided by its largest divisor, 35, gives 3.