21445920

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:355

約数の個数: 144

約数和(自身を含む): 74830392

約数和(自身を除く): 53384472

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 53, 60, 72, 80, 90, 96, 106, 120, 144, 159, 160, 180, 212, 240, 265, 281, 288, 318, 360, 424, 477, 480, 530, 562, 636, 720, 795, 843, 848, 954, 1060, 1124, 1272, 1405, 1440, 1590, 1686, 1696, 1908, 2120, 2248, 2385, 2529, 2544, 2810, 3180, 3372, 3816, 4215, 4240, 4496, 4770, 5058, 5088, 5620, 6360, 6744, 7632, 8430, 8480, 8992, 9540, 10116, 11240, 12645, 12720, 13488, 14893, 15264, 16860, 19080, 20232, 22480, 25290, 25440, 26976, 29786, 33720, 38160, 40464, 44679, 44960, 50580, 59572, 67440, 74465, 76320, 80928, 89358, 101160, 119144, 134037, 134880, 148930, 178716, 202320, 223395, 238288, 268074, 297860, 357432, 404640, 446790, 476576, 536148, 595720, 670185, 714864, 893580, 1072296, 1191440, 1340370, 1429728, 1787160, 2144592, 2382880, 2680740, 3574320, 4289184, 5361480, 7148640, 10722960, 21445920]

約数ペア:

[(1, 21445920), (2, 10722960), (3, 7148640), (4, 5361480), (5, 4289184), (6, 3574320), (8, 2680740), (9, 2382880), (10, 2144592), (12, 1787160), (15, 1429728), (16, 1340370), (18, 1191440), (20, 1072296), (24, 893580), (30, 714864), (32, 670185), (36, 595720), (40, 536148), (45, 476576), (48, 446790), (53, 404640), (60, 357432), (72, 297860), (80, 268074), (90, 238288), (96, 223395), (106, 202320), (120, 178716), (144, 148930), (159, 134880), (160, 134037), (180, 119144), (212, 101160), (240, 89358), (265, 80928), (281, 76320), (288, 74465), (318, 67440), (360, 59572), (424, 50580), (477, 44960), (480, 44679), (530, 40464), (562, 38160), (636, 33720), (720, 29786), (795, 26976), (843, 25440), (848, 25290), (954, 22480), (1060, 20232), (1124, 19080), (1272, 16860), (1405, 15264), (1440, 14893), (1590, 13488), (1686, 12720), (1696, 12645), (1908, 11240), (2120, 10116), (2248, 9540), (2385, 8992), (2529, 8480), (2544, 8430), (2810, 7632), (3180, 6744), (3372, 6360), (3816, 5620), (4215, 5088), (4240, 5058), (4496, 4770)]