Factors / Factors of 225

Factors of 225

1, 3, 5, 9, 15, 25, 45, 75, 225

225 is a perfect square (15² = 225); that gives 225 an odd 9-divisor count, since only 15 pairs with itself. 225's full pair list is (1, 225), (3, 75), (5, 45), (9, 25), (15, 15), for 9 divisors in total. 225's divisors other than 225 itself sum to just 178, 47 below 225: the common deficient case. 225 is odd, digit sum 9 for 225; small divisors of 225 include 3, 5, 9. 225 has 9 divisors; 224 has 12 and 226 has 4, so 224 wins here. 225 divided by its largest divisor, 75, gives 3.