Factors / Factors of 9

Factors of 9

1, 3, 9

9 is a perfect square (3² = 9); that gives 9 an odd 3-divisor count, since only 3 pairs with itself. 9's full pair list is (1, 9), (3, 3), for 3 divisors in total. 9's divisors other than 9 itself sum to just 4, 5 below 9: the common deficient case. 9 is odd, digit sum 9 for 9; small divisors of 9 include 3. 9 has 3 divisors; 8 has 4 and 10 has 4, so 8 wins here. 9 divided by its largest divisor, 3, gives 3.