21208320

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{263}}^1$

素因数の和:297

約数の個数: 216

約数和(自身を含む): 84180096

約数和(自身を除く): 62971776

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 263, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 526, 560, 576, 630, 640, 672, 720, 768, 789, 840, 896, 960, 1008, 1052, 1120, 1152, 1260, 1280, 1315, 1344, 1440, 1578, 1680, 1792, 1841, 1920, 2016, 2104, 2240, 2304, 2367, 2520, 2630, 2688, 2880, 3156, 3360, 3682, 3840, 3945, 4032, 4208, 4480, 4734, 5040, 5260, 5376, 5523, 5760, 6312, 6720, 7364, 7890, 8064, 8416, 8960, 9205, 9468, 10080, 10520, 11046, 11520, 11835, 12624, 13440, 14728, 15780, 16128, 16569, 16832, 18410, 18936, 20160, 21040, 22092, 23670, 25248, 26880, 27615, 29456, 31560, 33138, 33664, 36820, 37872, 40320, 42080, 44184, 47340, 50496, 55230, 58912, 63120, 66276, 67328, 73640, 75744, 80640, 82845, 84160, 88368, 94680, 100992, 110460, 117824, 126240, 132552, 147280, 151488, 165690, 168320, 176736, 189360, 201984, 220920, 235648, 252480, 265104, 294560, 302976, 331380, 336640, 353472, 378720, 441840, 471296, 504960, 530208, 589120, 605952, 662760, 706944, 757440, 883680, 1009920, 1060416, 1178240, 1325520, 1413888, 1514880, 1767360, 2120832, 2356480, 2651040, 3029760, 3534720, 4241664, 5302080, 7069440, 10604160, 21208320]

約数ペア:

[(1, 21208320), (2, 10604160), (3, 7069440), (4, 5302080), (5, 4241664), (6, 3534720), (7, 3029760), (8, 2651040), (9, 2356480), (10, 2120832), (12, 1767360), (14, 1514880), (15, 1413888), (16, 1325520), (18, 1178240), (20, 1060416), (21, 1009920), (24, 883680), (28, 757440), (30, 706944), (32, 662760), (35, 605952), (36, 589120), (40, 530208), (42, 504960), (45, 471296), (48, 441840), (56, 378720), (60, 353472), (63, 336640), (64, 331380), (70, 302976), (72, 294560), (80, 265104), (84, 252480), (90, 235648), (96, 220920), (105, 201984), (112, 189360), (120, 176736), (126, 168320), (128, 165690), (140, 151488), (144, 147280), (160, 132552), (168, 126240), (180, 117824), (192, 110460), (210, 100992), (224, 94680), (240, 88368), (252, 84160), (256, 82845), (263, 80640), (280, 75744), (288, 73640), (315, 67328), (320, 66276), (336, 63120), (360, 58912), (384, 55230), (420, 50496), (448, 47340), (480, 44184), (504, 42080), (526, 40320), (560, 37872), (576, 36820), (630, 33664), (640, 33138), (672, 31560), (720, 29456), (768, 27615), (789, 26880), (840, 25248), (896, 23670), (960, 22092), (1008, 21040), (1052, 20160), (1120, 18936), (1152, 18410), (1260, 16832), (1280, 16569), (1315, 16128), (1344, 15780), (1440, 14728), (1578, 13440), (1680, 12624), (1792, 11835), (1841, 11520), (1920, 11046), (2016, 10520), (2104, 10080), (2240, 9468), (2304, 9205), (2367, 8960), (2520, 8416), (2630, 8064), (2688, 7890), (2880, 7364), (3156, 6720), (3360, 6312), (3682, 5760), (3840, 5523), (3945, 5376), (4032, 5260), (4208, 5040), (4480, 4734)]