20007680

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1$

素因数の和:75

約数の個数: 216

約数和(自身を含む): 62914320

約数和(自身を除く): 42906640

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 29, 32, 35, 40, 44, 49, 55, 56, 58, 64, 70, 77, 80, 88, 98, 110, 112, 116, 128, 140, 145, 154, 160, 176, 196, 203, 220, 224, 232, 245, 256, 280, 290, 308, 319, 320, 352, 385, 392, 406, 440, 448, 464, 490, 539, 560, 580, 616, 638, 640, 704, 770, 784, 812, 880, 896, 928, 980, 1015, 1078, 1120, 1160, 1232, 1276, 1280, 1408, 1421, 1540, 1568, 1595, 1624, 1760, 1792, 1856, 1960, 2030, 2156, 2233, 2240, 2320, 2464, 2552, 2695, 2816, 2842, 3080, 3136, 3190, 3248, 3520, 3712, 3920, 4060, 4312, 4466, 4480, 4640, 4928, 5104, 5390, 5684, 6160, 6272, 6380, 6496, 7040, 7105, 7424, 7840, 8120, 8624, 8932, 8960, 9280, 9856, 10208, 10780, 11165, 11368, 12320, 12544, 12760, 12992, 14080, 14210, 15631, 15680, 16240, 17248, 17864, 18560, 19712, 20416, 21560, 22330, 22736, 24640, 25520, 25984, 28420, 31262, 31360, 32480, 34496, 35728, 37120, 40832, 43120, 44660, 45472, 49280, 51040, 51968, 56840, 62524, 62720, 64960, 68992, 71456, 78155, 81664, 86240, 89320, 90944, 98560, 102080, 113680, 125048, 129920, 137984, 142912, 156310, 172480, 178640, 181888, 204160, 227360, 250096, 259840, 285824, 312620, 344960, 357280, 363776, 408320, 454720, 500192, 571648, 625240, 689920, 714560, 909440, 1000384, 1250480, 1429120, 1818880, 2000768, 2500960, 2858240, 4001536, 5001920, 10003840, 20007680]

約数ペア:

[(1, 20007680), (2, 10003840), (4, 5001920), (5, 4001536), (7, 2858240), (8, 2500960), (10, 2000768), (11, 1818880), (14, 1429120), (16, 1250480), (20, 1000384), (22, 909440), (28, 714560), (29, 689920), (32, 625240), (35, 571648), (40, 500192), (44, 454720), (49, 408320), (55, 363776), (56, 357280), (58, 344960), (64, 312620), (70, 285824), (77, 259840), (80, 250096), (88, 227360), (98, 204160), (110, 181888), (112, 178640), (116, 172480), (128, 156310), (140, 142912), (145, 137984), (154, 129920), (160, 125048), (176, 113680), (196, 102080), (203, 98560), (220, 90944), (224, 89320), (232, 86240), (245, 81664), (256, 78155), (280, 71456), (290, 68992), (308, 64960), (319, 62720), (320, 62524), (352, 56840), (385, 51968), (392, 51040), (406, 49280), (440, 45472), (448, 44660), (464, 43120), (490, 40832), (539, 37120), (560, 35728), (580, 34496), (616, 32480), (638, 31360), (640, 31262), (704, 28420), (770, 25984), (784, 25520), (812, 24640), (880, 22736), (896, 22330), (928, 21560), (980, 20416), (1015, 19712), (1078, 18560), (1120, 17864), (1160, 17248), (1232, 16240), (1276, 15680), (1280, 15631), (1408, 14210), (1421, 14080), (1540, 12992), (1568, 12760), (1595, 12544), (1624, 12320), (1760, 11368), (1792, 11165), (1856, 10780), (1960, 10208), (2030, 9856), (2156, 9280), (2233, 8960), (2240, 8932), (2320, 8624), (2464, 8120), (2552, 7840), (2695, 7424), (2816, 7105), (2842, 7040), (3080, 6496), (3136, 6380), (3190, 6272), (3248, 6160), (3520, 5684), (3712, 5390), (3920, 5104), (4060, 4928), (4312, 4640), (4466, 4480)]