Factors / Factors of 16

Factors of 16

1, 2, 4, 8, 16

16 is a perfect square (4² = 16); that gives 16 an odd 5-divisor count, since only 4 pairs with itself. 16's full pair list is (1, 16), (2, 8), (4, 4), for 5 divisors in total. 16's divisors other than 16 itself sum to just 15, 1 below 16: the common deficient case. 16 is even, digit sum 7 for 16; small divisors of 16 include 2, 4, 8. 16 has 5 divisors; 15 has 4 and 17 has 2, so 16 wins here. 16 divided by its largest divisor, 8, gives 2.