Factors / Factors of 513

Factors of 513

1, 3, 9, 19, 27, 57, 171, 513

513 breaks into 4 pairs, tested up to √513 ≈ 22.6; each pair multiplies back to 513 exactly. 513's full pair list is (1, 513), (3, 171), (9, 57), (19, 27), for 8 divisors in total. 513's divisors other than 513 itself sum to just 287, 226 below 513: the common deficient case. 513 is odd, digit sum 9 for 513; small divisors of 513 include 3, 9. 513 has 8 divisors; 512 has 10 and 514 has 4, so 512 wins here. 513 divided by its largest divisor, 171, gives 3.