18000780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{42859}}^1$

素因数の和:42878

約数の個数: 48

約数和(自身を含む): 57603840

約数和(自身を除く): 39603060

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 42859, 85718, 128577, 171436, 214295, 257154, 300013, 428590, 514308, 600026, 642885, 857180, 900039, 1200052, 1285770, 1500065, 1800078, 2571540, 3000130, 3600156, 4500195, 6000260, 9000390, 18000780]

約数ペア:

[(1, 18000780), (2, 9000390), (3, 6000260), (4, 4500195), (5, 3600156), (6, 3000130), (7, 2571540), (10, 1800078), (12, 1500065), (14, 1285770), (15, 1200052), (20, 900039), (21, 857180), (28, 642885), (30, 600026), (35, 514308), (42, 428590), (60, 300013), (70, 257154), (84, 214295), (105, 171436), (140, 128577), (210, 85718), (420, 42859)]