19997120

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:83

約数の個数: 224

約数和(自身を含む): 61447680

約数和(自身を除く): 41450560

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 19, 20, 22, 23, 26, 32, 38, 40, 44, 46, 52, 55, 64, 65, 76, 80, 88, 92, 95, 104, 110, 115, 130, 143, 152, 160, 176, 184, 190, 208, 209, 220, 230, 247, 253, 260, 286, 299, 304, 320, 352, 368, 380, 416, 418, 437, 440, 460, 494, 506, 520, 572, 598, 608, 704, 715, 736, 760, 832, 836, 874, 880, 920, 988, 1012, 1040, 1045, 1144, 1196, 1216, 1235, 1265, 1430, 1472, 1495, 1520, 1672, 1748, 1760, 1840, 1976, 2024, 2080, 2090, 2185, 2288, 2392, 2470, 2530, 2717, 2860, 2990, 3040, 3289, 3344, 3496, 3520, 3680, 3952, 4048, 4160, 4180, 4370, 4576, 4784, 4807, 4940, 5060, 5434, 5681, 5720, 5980, 6080, 6578, 6688, 6992, 7360, 7904, 8096, 8360, 8740, 9152, 9568, 9614, 9880, 10120, 10868, 11362, 11440, 11960, 13156, 13376, 13585, 13984, 15808, 16192, 16445, 16720, 17480, 19136, 19228, 19760, 20240, 21736, 22724, 22880, 23920, 24035, 26312, 27170, 27968, 28405, 32890, 33440, 34960, 38456, 39520, 40480, 43472, 45448, 45760, 47840, 48070, 52624, 54340, 56810, 62491, 65780, 66880, 69920, 76912, 79040, 80960, 86944, 90896, 95680, 96140, 105248, 108680, 113620, 124982, 131560, 139840, 153824, 173888, 181792, 192280, 210496, 217360, 227240, 249964, 263120, 307648, 312455, 363584, 384560, 434720, 454480, 499928, 526240, 624910, 769120, 869440, 908960, 999856, 1052480, 1249820, 1538240, 1817920, 1999712, 2499640, 3999424, 4999280, 9998560, 19997120]

約数ペア:

[(1, 19997120), (2, 9998560), (4, 4999280), (5, 3999424), (8, 2499640), (10, 1999712), (11, 1817920), (13, 1538240), (16, 1249820), (19, 1052480), (20, 999856), (22, 908960), (23, 869440), (26, 769120), (32, 624910), (38, 526240), (40, 499928), (44, 454480), (46, 434720), (52, 384560), (55, 363584), (64, 312455), (65, 307648), (76, 263120), (80, 249964), (88, 227240), (92, 217360), (95, 210496), (104, 192280), (110, 181792), (115, 173888), (130, 153824), (143, 139840), (152, 131560), (160, 124982), (176, 113620), (184, 108680), (190, 105248), (208, 96140), (209, 95680), (220, 90896), (230, 86944), (247, 80960), (253, 79040), (260, 76912), (286, 69920), (299, 66880), (304, 65780), (320, 62491), (352, 56810), (368, 54340), (380, 52624), (416, 48070), (418, 47840), (437, 45760), (440, 45448), (460, 43472), (494, 40480), (506, 39520), (520, 38456), (572, 34960), (598, 33440), (608, 32890), (704, 28405), (715, 27968), (736, 27170), (760, 26312), (832, 24035), (836, 23920), (874, 22880), (880, 22724), (920, 21736), (988, 20240), (1012, 19760), (1040, 19228), (1045, 19136), (1144, 17480), (1196, 16720), (1216, 16445), (1235, 16192), (1265, 15808), (1430, 13984), (1472, 13585), (1495, 13376), (1520, 13156), (1672, 11960), (1748, 11440), (1760, 11362), (1840, 10868), (1976, 10120), (2024, 9880), (2080, 9614), (2090, 9568), (2185, 9152), (2288, 8740), (2392, 8360), (2470, 8096), (2530, 7904), (2717, 7360), (2860, 6992), (2990, 6688), (3040, 6578), (3289, 6080), (3344, 5980), (3496, 5720), (3520, 5681), (3680, 5434), (3952, 5060), (4048, 4940), (4160, 4807), (4180, 4784), (4370, 4576)]