20849840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:115

約数の個数: 160

約数和(自身を含む): 58924800

約数和(自身を除く): 38074960

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 29, 38, 40, 43, 44, 55, 58, 76, 80, 86, 88, 95, 110, 116, 145, 152, 172, 176, 190, 209, 215, 220, 232, 290, 304, 319, 344, 380, 418, 430, 440, 464, 473, 551, 580, 638, 688, 760, 817, 836, 860, 880, 946, 1045, 1102, 1160, 1247, 1276, 1520, 1595, 1634, 1672, 1720, 1892, 2090, 2204, 2320, 2365, 2494, 2552, 2755, 3190, 3268, 3344, 3440, 3784, 4085, 4180, 4408, 4730, 4988, 5104, 5510, 6061, 6235, 6380, 6536, 7568, 8170, 8360, 8816, 8987, 9460, 9976, 11020, 12122, 12470, 12760, 13072, 13717, 16340, 16720, 17974, 18920, 19952, 22040, 23693, 24244, 24940, 25520, 27434, 30305, 32680, 35948, 37840, 44080, 44935, 47386, 48488, 49880, 54868, 60610, 65360, 68585, 71896, 89870, 94772, 96976, 99760, 109736, 118465, 121220, 137170, 143792, 179740, 189544, 219472, 236930, 242440, 260623, 274340, 359480, 379088, 473860, 484880, 521246, 548680, 718960, 947720, 1042492, 1097360, 1303115, 1895440, 2084984, 2606230, 4169968, 5212460, 10424920, 20849840]

約数ペア:

[(1, 20849840), (2, 10424920), (4, 5212460), (5, 4169968), (8, 2606230), (10, 2084984), (11, 1895440), (16, 1303115), (19, 1097360), (20, 1042492), (22, 947720), (29, 718960), (38, 548680), (40, 521246), (43, 484880), (44, 473860), (55, 379088), (58, 359480), (76, 274340), (80, 260623), (86, 242440), (88, 236930), (95, 219472), (110, 189544), (116, 179740), (145, 143792), (152, 137170), (172, 121220), (176, 118465), (190, 109736), (209, 99760), (215, 96976), (220, 94772), (232, 89870), (290, 71896), (304, 68585), (319, 65360), (344, 60610), (380, 54868), (418, 49880), (430, 48488), (440, 47386), (464, 44935), (473, 44080), (551, 37840), (580, 35948), (638, 32680), (688, 30305), (760, 27434), (817, 25520), (836, 24940), (860, 24244), (880, 23693), (946, 22040), (1045, 19952), (1102, 18920), (1160, 17974), (1247, 16720), (1276, 16340), (1520, 13717), (1595, 13072), (1634, 12760), (1672, 12470), (1720, 12122), (1892, 11020), (2090, 9976), (2204, 9460), (2320, 8987), (2365, 8816), (2494, 8360), (2552, 8170), (2755, 7568), (3190, 6536), (3268, 6380), (3344, 6235), (3440, 6061), (3784, 5510), (4085, 5104), (4180, 4988), (4408, 4730)]