Factors / Factors of 153

Factors of 153

1, 3, 9, 17, 51, 153

153 breaks into 3 pairs, tested up to √153 ≈ 12.4; each pair multiplies back to 153 exactly. 153's full pair list is (1, 153), (3, 51), (9, 17), for 6 divisors in total. 153's divisors other than 153 itself sum to just 81, 72 below 153: the common deficient case. 153 is odd, digit sum 9 for 153; small divisors of 153 include 3, 9. 153 has 6 divisors; 152 has 8 and 154 has 8, so 152 wins here. 153 divided by its largest divisor, 51, gives 3.