20742040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 35245160

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 47, 55, 59, 68, 85, 88, 94, 110, 118, 136, 170, 187, 188, 220, 235, 236, 295, 340, 374, 376, 440, 470, 472, 517, 590, 649, 680, 748, 799, 935, 940, 1003, 1034, 1180, 1298, 1496, 1598, 1870, 1880, 2006, 2068, 2360, 2585, 2596, 2773, 3196, 3245, 3740, 3995, 4012, 4136, 5015, 5170, 5192, 5546, 6392, 6490, 7480, 7990, 8024, 8789, 10030, 10340, 11033, 11092, 12980, 13865, 15980, 17578, 20060, 20680, 22066, 22184, 25960, 27730, 30503, 31960, 35156, 40120, 43945, 44132, 47141, 55165, 55460, 61006, 70312, 87890, 88264, 94282, 110330, 110920, 122012, 152515, 175780, 188564, 220660, 235705, 244024, 305030, 351560, 377128, 441320, 471410, 518551, 610060, 942820, 1037102, 1220120, 1885640, 2074204, 2592755, 4148408, 5185510, 10371020, 20742040]

約数ペア:

[(1, 20742040), (2, 10371020), (4, 5185510), (5, 4148408), (8, 2592755), (10, 2074204), (11, 1885640), (17, 1220120), (20, 1037102), (22, 942820), (34, 610060), (40, 518551), (44, 471410), (47, 441320), (55, 377128), (59, 351560), (68, 305030), (85, 244024), (88, 235705), (94, 220660), (110, 188564), (118, 175780), (136, 152515), (170, 122012), (187, 110920), (188, 110330), (220, 94282), (235, 88264), (236, 87890), (295, 70312), (340, 61006), (374, 55460), (376, 55165), (440, 47141), (470, 44132), (472, 43945), (517, 40120), (590, 35156), (649, 31960), (680, 30503), (748, 27730), (799, 25960), (935, 22184), (940, 22066), (1003, 20680), (1034, 20060), (1180, 17578), (1298, 15980), (1496, 13865), (1598, 12980), (1870, 11092), (1880, 11033), (2006, 10340), (2068, 10030), (2360, 8789), (2585, 8024), (2596, 7990), (2773, 7480), (3196, 6490), (3245, 6392), (3740, 5546), (3995, 5192), (4012, 5170), (4136, 5015)]