21257280

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1$

素因数の和:106

約数の個数: 252

約数和(自身を含む): 81684876

約数和(自身を除く): 60427596

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 32, 33, 36, 40, 44, 45, 48, 55, 60, 61, 64, 66, 72, 80, 88, 90, 96, 99, 110, 120, 121, 122, 132, 144, 160, 165, 176, 180, 183, 192, 198, 220, 240, 242, 244, 264, 288, 305, 320, 330, 352, 360, 363, 366, 396, 440, 480, 484, 488, 495, 528, 549, 576, 605, 610, 660, 671, 704, 720, 726, 732, 792, 880, 915, 960, 968, 976, 990, 1056, 1089, 1098, 1210, 1220, 1320, 1342, 1440, 1452, 1464, 1584, 1760, 1815, 1830, 1936, 1952, 1980, 2013, 2112, 2178, 2196, 2420, 2440, 2640, 2684, 2745, 2880, 2904, 2928, 3168, 3355, 3520, 3630, 3660, 3872, 3904, 3960, 4026, 4356, 4392, 4840, 4880, 5280, 5368, 5445, 5490, 5808, 5856, 6039, 6336, 6710, 7260, 7320, 7381, 7744, 7920, 8052, 8712, 8784, 9680, 9760, 10065, 10560, 10736, 10890, 10980, 11616, 11712, 12078, 13420, 14520, 14640, 14762, 15840, 16104, 17424, 17568, 19360, 19520, 20130, 21472, 21780, 21960, 22143, 23232, 24156, 26840, 29040, 29280, 29524, 30195, 31680, 32208, 34848, 35136, 36905, 38720, 40260, 42944, 43560, 43920, 44286, 48312, 53680, 58080, 58560, 59048, 60390, 64416, 66429, 69696, 73810, 80520, 87120, 87840, 88572, 96624, 107360, 110715, 116160, 118096, 120780, 128832, 132858, 147620, 161040, 174240, 175680, 177144, 193248, 214720, 221430, 236192, 241560, 265716, 295240, 322080, 332145, 348480, 354288, 386496, 442860, 472384, 483120, 531432, 590480, 644160, 664290, 708576, 885720, 966240, 1062864, 1180960, 1328580, 1417152, 1771440, 1932480, 2125728, 2361920, 2657160, 3542880, 4251456, 5314320, 7085760, 10628640, 21257280]

約数ペア:

[(1, 21257280), (2, 10628640), (3, 7085760), (4, 5314320), (5, 4251456), (6, 3542880), (8, 2657160), (9, 2361920), (10, 2125728), (11, 1932480), (12, 1771440), (15, 1417152), (16, 1328580), (18, 1180960), (20, 1062864), (22, 966240), (24, 885720), (30, 708576), (32, 664290), (33, 644160), (36, 590480), (40, 531432), (44, 483120), (45, 472384), (48, 442860), (55, 386496), (60, 354288), (61, 348480), (64, 332145), (66, 322080), (72, 295240), (80, 265716), (88, 241560), (90, 236192), (96, 221430), (99, 214720), (110, 193248), (120, 177144), (121, 175680), (122, 174240), (132, 161040), (144, 147620), (160, 132858), (165, 128832), (176, 120780), (180, 118096), (183, 116160), (192, 110715), (198, 107360), (220, 96624), (240, 88572), (242, 87840), (244, 87120), (264, 80520), (288, 73810), (305, 69696), (320, 66429), (330, 64416), (352, 60390), (360, 59048), (363, 58560), (366, 58080), (396, 53680), (440, 48312), (480, 44286), (484, 43920), (488, 43560), (495, 42944), (528, 40260), (549, 38720), (576, 36905), (605, 35136), (610, 34848), (660, 32208), (671, 31680), (704, 30195), (720, 29524), (726, 29280), (732, 29040), (792, 26840), (880, 24156), (915, 23232), (960, 22143), (968, 21960), (976, 21780), (990, 21472), (1056, 20130), (1089, 19520), (1098, 19360), (1210, 17568), (1220, 17424), (1320, 16104), (1342, 15840), (1440, 14762), (1452, 14640), (1464, 14520), (1584, 13420), (1760, 12078), (1815, 11712), (1830, 11616), (1936, 10980), (1952, 10890), (1980, 10736), (2013, 10560), (2112, 10065), (2178, 9760), (2196, 9680), (2420, 8784), (2440, 8712), (2640, 8052), (2684, 7920), (2745, 7744), (2880, 7381), (2904, 7320), (2928, 7260), (3168, 6710), (3355, 6336), (3520, 6039), (3630, 5856), (3660, 5808), (3872, 5490), (3904, 5445), (3960, 5368), (4026, 5280), (4356, 4880), (4392, 4840)]