21717360

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:196

約数の個数: 240

約数和(自身を含む): 86661120

約数和(自身を除く): 64943760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 48, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 105, 112, 120, 124, 126, 139, 140, 144, 155, 168, 180, 186, 210, 217, 240, 248, 252, 278, 279, 280, 310, 315, 336, 360, 372, 417, 420, 434, 465, 496, 504, 556, 558, 560, 620, 630, 651, 695, 720, 744, 834, 840, 868, 930, 973, 1008, 1085, 1112, 1116, 1240, 1251, 1260, 1302, 1390, 1395, 1488, 1668, 1680, 1736, 1860, 1946, 1953, 2085, 2170, 2224, 2232, 2480, 2502, 2520, 2604, 2780, 2790, 2919, 3255, 3336, 3472, 3720, 3892, 3906, 4170, 4309, 4340, 4464, 4865, 5004, 5040, 5208, 5560, 5580, 5838, 6255, 6510, 6672, 7440, 7784, 7812, 8340, 8618, 8680, 8757, 9730, 9765, 10008, 10416, 11120, 11160, 11676, 12510, 12927, 13020, 14595, 15568, 15624, 16680, 17236, 17360, 17514, 19460, 19530, 20016, 21545, 22320, 23352, 25020, 25854, 26040, 29190, 30163, 31248, 33360, 34472, 35028, 38781, 38920, 39060, 43090, 43785, 46704, 50040, 51708, 52080, 58380, 60326, 64635, 68944, 70056, 77562, 77840, 78120, 86180, 87570, 90489, 100080, 103416, 116760, 120652, 129270, 140112, 150815, 155124, 156240, 172360, 175140, 180978, 193905, 206832, 233520, 241304, 258540, 271467, 301630, 310248, 344720, 350280, 361956, 387810, 452445, 482608, 517080, 542934, 603260, 620496, 700560, 723912, 775620, 904890, 1034160, 1085868, 1206520, 1357335, 1447824, 1551240, 1809780, 2171736, 2413040, 2714670, 3102480, 3619560, 4343472, 5429340, 7239120, 10858680, 21717360]

約数ペア:

[(1, 21717360), (2, 10858680), (3, 7239120), (4, 5429340), (5, 4343472), (6, 3619560), (7, 3102480), (8, 2714670), (9, 2413040), (10, 2171736), (12, 1809780), (14, 1551240), (15, 1447824), (16, 1357335), (18, 1206520), (20, 1085868), (21, 1034160), (24, 904890), (28, 775620), (30, 723912), (31, 700560), (35, 620496), (36, 603260), (40, 542934), (42, 517080), (45, 482608), (48, 452445), (56, 387810), (60, 361956), (62, 350280), (63, 344720), (70, 310248), (72, 301630), (80, 271467), (84, 258540), (90, 241304), (93, 233520), (105, 206832), (112, 193905), (120, 180978), (124, 175140), (126, 172360), (139, 156240), (140, 155124), (144, 150815), (155, 140112), (168, 129270), (180, 120652), (186, 116760), (210, 103416), (217, 100080), (240, 90489), (248, 87570), (252, 86180), (278, 78120), (279, 77840), (280, 77562), (310, 70056), (315, 68944), (336, 64635), (360, 60326), (372, 58380), (417, 52080), (420, 51708), (434, 50040), (465, 46704), (496, 43785), (504, 43090), (556, 39060), (558, 38920), (560, 38781), (620, 35028), (630, 34472), (651, 33360), (695, 31248), (720, 30163), (744, 29190), (834, 26040), (840, 25854), (868, 25020), (930, 23352), (973, 22320), (1008, 21545), (1085, 20016), (1112, 19530), (1116, 19460), (1240, 17514), (1251, 17360), (1260, 17236), (1302, 16680), (1390, 15624), (1395, 15568), (1488, 14595), (1668, 13020), (1680, 12927), (1736, 12510), (1860, 11676), (1946, 11160), (1953, 11120), (2085, 10416), (2170, 10008), (2224, 9765), (2232, 9730), (2480, 8757), (2502, 8680), (2520, 8618), (2604, 8340), (2780, 7812), (2790, 7784), (2919, 7440), (3255, 6672), (3336, 6510), (3472, 6255), (3720, 5838), (3892, 5580), (3906, 5560), (4170, 5208), (4309, 5040), (4340, 5004), (4464, 4865)]