21257760

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{661}}^1$

素因数の和:746

約数の個数: 96

約数和(自身を含む): 68064192

約数和(自身を除く): 46806432

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 67, 80, 96, 120, 134, 160, 201, 240, 268, 335, 402, 480, 536, 661, 670, 804, 1005, 1072, 1322, 1340, 1608, 1983, 2010, 2144, 2644, 2680, 3216, 3305, 3966, 4020, 5288, 5360, 6432, 6610, 7932, 8040, 9915, 10576, 10720, 13220, 15864, 16080, 19830, 21152, 26440, 31728, 32160, 39660, 44287, 52880, 63456, 79320, 88574, 105760, 132861, 158640, 177148, 221435, 265722, 317280, 354296, 442870, 531444, 664305, 708592, 885740, 1062888, 1328610, 1417184, 1771480, 2125776, 2657220, 3542960, 4251552, 5314440, 7085920, 10628880, 21257760]

約数ペア:

[(1, 21257760), (2, 10628880), (3, 7085920), (4, 5314440), (5, 4251552), (6, 3542960), (8, 2657220), (10, 2125776), (12, 1771480), (15, 1417184), (16, 1328610), (20, 1062888), (24, 885740), (30, 708592), (32, 664305), (40, 531444), (48, 442870), (60, 354296), (67, 317280), (80, 265722), (96, 221435), (120, 177148), (134, 158640), (160, 132861), (201, 105760), (240, 88574), (268, 79320), (335, 63456), (402, 52880), (480, 44287), (536, 39660), (661, 32160), (670, 31728), (804, 26440), (1005, 21152), (1072, 19830), (1322, 16080), (1340, 15864), (1608, 13220), (1983, 10720), (2010, 10576), (2144, 9915), (2644, 8040), (2680, 7932), (3216, 6610), (3305, 6432), (3966, 5360), (4020, 5288)]