21817440

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:269

約数の個数: 144

約数和(自身を含む): 75675600

約数和(自身を除く): 53858160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 109, 120, 139, 144, 160, 180, 218, 240, 278, 288, 327, 360, 417, 436, 480, 545, 556, 654, 695, 720, 834, 872, 981, 1090, 1112, 1251, 1308, 1390, 1440, 1635, 1668, 1744, 1962, 2085, 2180, 2224, 2502, 2616, 2780, 3270, 3336, 3488, 3924, 4170, 4360, 4448, 4905, 5004, 5232, 5560, 6255, 6540, 6672, 7848, 8340, 8720, 9810, 10008, 10464, 11120, 12510, 13080, 13344, 15151, 15696, 16680, 17440, 19620, 20016, 22240, 25020, 26160, 30302, 31392, 33360, 39240, 40032, 45453, 50040, 52320, 60604, 66720, 75755, 78480, 90906, 100080, 121208, 136359, 151510, 156960, 181812, 200160, 227265, 242416, 272718, 303020, 363624, 454530, 484832, 545436, 606040, 681795, 727248, 909060, 1090872, 1212080, 1363590, 1454496, 1818120, 2181744, 2424160, 2727180, 3636240, 4363488, 5454360, 7272480, 10908720, 21817440]

約数ペア:

[(1, 21817440), (2, 10908720), (3, 7272480), (4, 5454360), (5, 4363488), (6, 3636240), (8, 2727180), (9, 2424160), (10, 2181744), (12, 1818120), (15, 1454496), (16, 1363590), (18, 1212080), (20, 1090872), (24, 909060), (30, 727248), (32, 681795), (36, 606040), (40, 545436), (45, 484832), (48, 454530), (60, 363624), (72, 303020), (80, 272718), (90, 242416), (96, 227265), (109, 200160), (120, 181812), (139, 156960), (144, 151510), (160, 136359), (180, 121208), (218, 100080), (240, 90906), (278, 78480), (288, 75755), (327, 66720), (360, 60604), (417, 52320), (436, 50040), (480, 45453), (545, 40032), (556, 39240), (654, 33360), (695, 31392), (720, 30302), (834, 26160), (872, 25020), (981, 22240), (1090, 20016), (1112, 19620), (1251, 17440), (1308, 16680), (1390, 15696), (1440, 15151), (1635, 13344), (1668, 13080), (1744, 12510), (1962, 11120), (2085, 10464), (2180, 10008), (2224, 9810), (2502, 8720), (2616, 8340), (2780, 7848), (3270, 6672), (3336, 6540), (3488, 6255), (3924, 5560), (4170, 5232), (4360, 5004), (4448, 4905)]