Factors / Factors of 381

Factors of 381

1, 3, 127, 381

381 breaks into 2 pairs, tested up to √381 ≈ 19.5; each pair multiplies back to 381 exactly. 381's full pair list is (1, 381), (3, 127), for 4 divisors in total. 381's divisors other than 381 itself sum to just 131, 250 below 381: the common deficient case. 381 is odd, digit sum 12 for 381; small divisors of 381 include 3. 381 has 4 divisors; 380 has 12 and 382 has 4, so 380 wins here. 381 divided by its largest divisor, 127, gives 3.