Factors / Factors of 519

Factors of 519

1, 3, 173, 519

519 breaks into 2 pairs, tested up to √519 ≈ 22.8; each pair multiplies back to 519 exactly. 519's full pair list is (1, 519), (3, 173), for 4 divisors in total. 519's divisors other than 519 itself sum to just 177, 342 below 519: the common deficient case. 519 is odd, digit sum 15 for 519; small divisors of 519 include 3. 519 has 4 divisors; 518 has 8 and 520 has 16, so 520 wins here. 519 divided by its largest divisor, 173, gives 3.