Factors / Factors of 539

Factors of 539

1, 7, 11, 49, 77, 539

539 breaks into 3 pairs, tested up to √539 ≈ 23.2; each pair multiplies back to 539 exactly. 539's full pair list is (1, 539), (7, 77), (11, 49), for 6 divisors in total. 539's divisors other than 539 itself sum to just 145, 394 below 539: the common deficient case. 539 is odd, digit sum 17 for 539; small divisors of 539 include 7, 11. 539 has 6 divisors; 538 has 4 and 540 has 24, so 540 wins here. 539 divided by its largest divisor, 77, gives 7.