20581380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1049}}^1$

素因数の和:1173

約数の個数: 72

約数和(自身を含む): 63063000

約数和(自身を除く): 42481620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 109, 180, 218, 327, 436, 545, 654, 981, 1049, 1090, 1308, 1635, 1962, 2098, 2180, 3147, 3270, 3924, 4196, 4905, 5245, 6294, 6540, 9441, 9810, 10490, 12588, 15735, 18882, 19620, 20980, 31470, 37764, 47205, 62940, 94410, 114341, 188820, 228682, 343023, 457364, 571705, 686046, 1029069, 1143410, 1372092, 1715115, 2058138, 2286820, 3430230, 4116276, 5145345, 6860460, 10290690, 20581380]

約数ペア:

[(1, 20581380), (2, 10290690), (3, 6860460), (4, 5145345), (5, 4116276), (6, 3430230), (9, 2286820), (10, 2058138), (12, 1715115), (15, 1372092), (18, 1143410), (20, 1029069), (30, 686046), (36, 571705), (45, 457364), (60, 343023), (90, 228682), (109, 188820), (180, 114341), (218, 94410), (327, 62940), (436, 47205), (545, 37764), (654, 31470), (981, 20980), (1049, 19620), (1090, 18882), (1308, 15735), (1635, 12588), (1962, 10490), (2098, 9810), (2180, 9441), (3147, 6540), (3270, 6294), (3924, 5245), (4196, 4905)]