20691540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{827}}^1$

素因数の和:981

約数の個数: 72

約数和(自身を含む): 63292320

約数和(自身を除く): 42600780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 139, 180, 278, 417, 556, 695, 827, 834, 1251, 1390, 1654, 1668, 2085, 2481, 2502, 2780, 3308, 4135, 4170, 4962, 5004, 6255, 7443, 8270, 8340, 9924, 12405, 12510, 14886, 16540, 24810, 25020, 29772, 37215, 49620, 74430, 114953, 148860, 229906, 344859, 459812, 574765, 689718, 1034577, 1149530, 1379436, 1724295, 2069154, 2299060, 3448590, 4138308, 5172885, 6897180, 10345770, 20691540]

約数ペア:

[(1, 20691540), (2, 10345770), (3, 6897180), (4, 5172885), (5, 4138308), (6, 3448590), (9, 2299060), (10, 2069154), (12, 1724295), (15, 1379436), (18, 1149530), (20, 1034577), (30, 689718), (36, 574765), (45, 459812), (60, 344859), (90, 229906), (139, 148860), (180, 114953), (278, 74430), (417, 49620), (556, 37215), (695, 29772), (827, 25020), (834, 24810), (1251, 16540), (1390, 14886), (1654, 12510), (1668, 12405), (2085, 9924), (2481, 8340), (2502, 8270), (2780, 7443), (3308, 6255), (4135, 5004), (4170, 4962)]