Factors / Factors of 423

Factors of 423

1, 3, 9, 47, 141, 423

423 breaks into 3 pairs, tested up to √423 ≈ 20.6; each pair multiplies back to 423 exactly. 423's full pair list is (1, 423), (3, 141), (9, 47), for 6 divisors in total. 423's divisors other than 423 itself sum to just 201, 222 below 423: the common deficient case. 423 is odd, digit sum 9 for 423; small divisors of 423 include 3, 9. 423 has 6 divisors; 422 has 4 and 424 has 8, so 424 wins here. 423 divided by its largest divisor, 141, gives 3.