Factors / Factors of 279

Factors of 279

1, 3, 9, 31, 93, 279

279 breaks into 3 pairs, tested up to √279 ≈ 16.7; each pair multiplies back to 279 exactly. 279's full pair list is (1, 279), (3, 93), (9, 31), for 6 divisors in total. 279's divisors other than 279 itself sum to just 137, 142 below 279: the common deficient case. 279 is odd, digit sum 18 for 279; small divisors of 279 include 3, 9. 279 has 6 divisors; 278 has 4 and 280 has 16, so 280 wins here. 279 divided by its largest divisor, 93, gives 3.