Factors / Factors of 520

Factors of 520

1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520

520 breaks into 8 pairs, tested up to √520 ≈ 22.8; each pair multiplies back to 520 exactly. 520's full pair list is (1, 520), (2, 260), (4, 130), (5, 104), (8, 65), (10, 52), (13, 40), (20, 26), for 16 divisors in total. 520's divisors other than 520 itself sum to 740, 220 above 520: abundant. 520 is even, digit sum 7 for 520; small divisors of 520 include 2, 4, 5, 8, 10. 520 has 16 divisors; 519 has 4 and 521 has 2, so 520 wins here. 520 divided by its largest divisor, 260, gives 2.