21113820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1289}}^1$

素因数の和:1324

約数の個数: 144

約数和(自身を含む): 78886080

約数和(自身を除く): 57772260

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 105, 117, 126, 130, 140, 156, 180, 182, 195, 210, 234, 252, 260, 273, 315, 364, 390, 420, 455, 468, 546, 585, 630, 780, 819, 910, 1092, 1170, 1260, 1289, 1365, 1638, 1820, 2340, 2578, 2730, 3276, 3867, 4095, 5156, 5460, 6445, 7734, 8190, 9023, 11601, 12890, 15468, 16380, 16757, 18046, 19335, 23202, 25780, 27069, 33514, 36092, 38670, 45115, 46404, 50271, 54138, 58005, 67028, 77340, 81207, 83785, 90230, 100542, 108276, 116010, 117299, 135345, 150813, 162414, 167570, 180460, 201084, 232020, 234598, 251355, 270690, 301626, 324828, 335140, 351897, 406035, 469196, 502710, 541380, 586495, 603252, 703794, 754065, 812070, 1005420, 1055691, 1172990, 1407588, 1508130, 1624140, 1759485, 2111382, 2345980, 3016260, 3518970, 4222764, 5278455, 7037940, 10556910, 21113820]

約数ペア:

[(1, 21113820), (2, 10556910), (3, 7037940), (4, 5278455), (5, 4222764), (6, 3518970), (7, 3016260), (9, 2345980), (10, 2111382), (12, 1759485), (13, 1624140), (14, 1508130), (15, 1407588), (18, 1172990), (20, 1055691), (21, 1005420), (26, 812070), (28, 754065), (30, 703794), (35, 603252), (36, 586495), (39, 541380), (42, 502710), (45, 469196), (52, 406035), (60, 351897), (63, 335140), (65, 324828), (70, 301626), (78, 270690), (84, 251355), (90, 234598), (91, 232020), (105, 201084), (117, 180460), (126, 167570), (130, 162414), (140, 150813), (156, 135345), (180, 117299), (182, 116010), (195, 108276), (210, 100542), (234, 90230), (252, 83785), (260, 81207), (273, 77340), (315, 67028), (364, 58005), (390, 54138), (420, 50271), (455, 46404), (468, 45115), (546, 38670), (585, 36092), (630, 33514), (780, 27069), (819, 25780), (910, 23202), (1092, 19335), (1170, 18046), (1260, 16757), (1289, 16380), (1365, 15468), (1638, 12890), (1820, 11601), (2340, 9023), (2578, 8190), (2730, 7734), (3276, 6445), (3867, 5460), (4095, 5156)]