Factors / Factors of 351

Factors of 351

1, 3, 9, 13, 27, 39, 117, 351

351 breaks into 4 pairs, tested up to √351 ≈ 18.7; each pair multiplies back to 351 exactly. 351's full pair list is (1, 351), (3, 117), (9, 39), (13, 27), for 8 divisors in total. 351's divisors other than 351 itself sum to just 209, 142 below 351: the common deficient case. 351 is odd, digit sum 9 for 351; small divisors of 351 include 3, 9. 351 has 8 divisors; 350 has 12 and 352 has 12, so 350 wins here. 351 divided by its largest divisor, 117, gives 3.