Factors / Factors of 291

Factors of 291

1, 3, 97, 291

291 breaks into 2 pairs, tested up to √291 ≈ 17.1; each pair multiplies back to 291 exactly. 291's full pair list is (1, 291), (3, 97), for 4 divisors in total. 291's divisors other than 291 itself sum to just 101, 190 below 291: the common deficient case. 291 is odd, digit sum 12 for 291; small divisors of 291 include 3. 291 has 4 divisors; 290 has 8 and 292 has 6, so 290 wins here. 291 divided by its largest divisor, 97, gives 3.