20875680

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1$

素因数の和:156

約数の個数: 288

約数和(自身を含む): 86486400

約数和(自身を除く): 65610720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 19, 20, 21, 24, 28, 30, 32, 35, 36, 38, 40, 42, 45, 48, 56, 57, 60, 63, 70, 72, 76, 80, 84, 90, 95, 96, 105, 109, 112, 114, 120, 126, 133, 140, 144, 152, 160, 168, 171, 180, 190, 210, 218, 224, 228, 240, 252, 266, 280, 285, 288, 304, 315, 327, 336, 342, 360, 380, 399, 420, 436, 456, 480, 504, 532, 545, 560, 570, 608, 630, 654, 665, 672, 684, 720, 760, 763, 798, 840, 855, 872, 912, 981, 1008, 1064, 1090, 1120, 1140, 1197, 1260, 1308, 1330, 1368, 1440, 1520, 1526, 1596, 1635, 1680, 1710, 1744, 1824, 1962, 1995, 2016, 2071, 2128, 2180, 2280, 2289, 2394, 2520, 2616, 2660, 2736, 3040, 3052, 3192, 3270, 3360, 3420, 3488, 3815, 3924, 3990, 4142, 4256, 4360, 4560, 4578, 4788, 4905, 5040, 5232, 5320, 5472, 5985, 6104, 6213, 6384, 6540, 6840, 6867, 7630, 7848, 7980, 8284, 8720, 9120, 9156, 9576, 9810, 10080, 10355, 10464, 10640, 11445, 11970, 12208, 12426, 12768, 13080, 13680, 13734, 14497, 15260, 15696, 15960, 16568, 17440, 18312, 18639, 19152, 19620, 20710, 21280, 22890, 23940, 24416, 24852, 26160, 27360, 27468, 28994, 30520, 31065, 31392, 31920, 33136, 34335, 36624, 37278, 38304, 39240, 41420, 43491, 45780, 47880, 49704, 52320, 54936, 57988, 61040, 62130, 63840, 66272, 68670, 72485, 73248, 74556, 78480, 82840, 86982, 91560, 93195, 95760, 99408, 109872, 115976, 122080, 124260, 130473, 137340, 144970, 149112, 156960, 165680, 173964, 183120, 186390, 191520, 198816, 217455, 219744, 231952, 248520, 260946, 274680, 289940, 298224, 331360, 347928, 366240, 372780, 434910, 463904, 497040, 521892, 549360, 579880, 596448, 652365, 695856, 745560, 869820, 994080, 1043784, 1098720, 1159760, 1304730, 1391712, 1491120, 1739640, 2087568, 2319520, 2609460, 2982240, 3479280, 4175136, 5218920, 6958560, 10437840, 20875680]

約数ペア:

[(1, 20875680), (2, 10437840), (3, 6958560), (4, 5218920), (5, 4175136), (6, 3479280), (7, 2982240), (8, 2609460), (9, 2319520), (10, 2087568), (12, 1739640), (14, 1491120), (15, 1391712), (16, 1304730), (18, 1159760), (19, 1098720), (20, 1043784), (21, 994080), (24, 869820), (28, 745560), (30, 695856), (32, 652365), (35, 596448), (36, 579880), (38, 549360), (40, 521892), (42, 497040), (45, 463904), (48, 434910), (56, 372780), (57, 366240), (60, 347928), (63, 331360), (70, 298224), (72, 289940), (76, 274680), (80, 260946), (84, 248520), (90, 231952), (95, 219744), (96, 217455), (105, 198816), (109, 191520), (112, 186390), (114, 183120), (120, 173964), (126, 165680), (133, 156960), (140, 149112), (144, 144970), (152, 137340), (160, 130473), (168, 124260), (171, 122080), (180, 115976), (190, 109872), (210, 99408), (218, 95760), (224, 93195), (228, 91560), (240, 86982), (252, 82840), (266, 78480), (280, 74556), (285, 73248), (288, 72485), (304, 68670), (315, 66272), (327, 63840), (336, 62130), (342, 61040), (360, 57988), (380, 54936), (399, 52320), (420, 49704), (436, 47880), (456, 45780), (480, 43491), (504, 41420), (532, 39240), (545, 38304), (560, 37278), (570, 36624), (608, 34335), (630, 33136), (654, 31920), (665, 31392), (672, 31065), (684, 30520), (720, 28994), (760, 27468), (763, 27360), (798, 26160), (840, 24852), (855, 24416), (872, 23940), (912, 22890), (981, 21280), (1008, 20710), (1064, 19620), (1090, 19152), (1120, 18639), (1140, 18312), (1197, 17440), (1260, 16568), (1308, 15960), (1330, 15696), (1368, 15260), (1440, 14497), (1520, 13734), (1526, 13680), (1596, 13080), (1635, 12768), (1680, 12426), (1710, 12208), (1744, 11970), (1824, 11445), (1962, 10640), (1995, 10464), (2016, 10355), (2071, 10080), (2128, 9810), (2180, 9576), (2280, 9156), (2289, 9120), (2394, 8720), (2520, 8284), (2616, 7980), (2660, 7848), (2736, 7630), (3040, 6867), (3052, 6840), (3192, 6540), (3270, 6384), (3360, 6213), (3420, 6104), (3488, 5985), (3815, 5472), (3924, 5320), (3990, 5232), (4142, 5040), (4256, 4905), (4360, 4788), (4560, 4578)]