20938736

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:298

約数の個数: 80

約数和(自身を含む): 50871744

約数和(自身を除く): 29933008

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 73, 91, 104, 112, 146, 182, 197, 208, 292, 364, 394, 511, 584, 728, 788, 949, 1022, 1168, 1379, 1456, 1576, 1898, 2044, 2561, 2758, 3152, 3796, 4088, 5122, 5516, 6643, 7592, 8176, 10244, 11032, 13286, 14381, 15184, 17927, 20488, 22064, 26572, 28762, 35854, 40976, 53144, 57524, 71708, 100667, 106288, 115048, 143416, 186953, 201334, 230096, 286832, 373906, 402668, 747812, 805336, 1308671, 1495624, 1610672, 2617342, 2991248, 5234684, 10469368, 20938736]

約数ペア:

[(1, 20938736), (2, 10469368), (4, 5234684), (7, 2991248), (8, 2617342), (13, 1610672), (14, 1495624), (16, 1308671), (26, 805336), (28, 747812), (52, 402668), (56, 373906), (73, 286832), (91, 230096), (104, 201334), (112, 186953), (146, 143416), (182, 115048), (197, 106288), (208, 100667), (292, 71708), (364, 57524), (394, 53144), (511, 40976), (584, 35854), (728, 28762), (788, 26572), (949, 22064), (1022, 20488), (1168, 17927), (1379, 15184), (1456, 14381), (1576, 13286), (1898, 11032), (2044, 10244), (2561, 8176), (2758, 7592), (3152, 6643), (3796, 5516), (4088, 5122)]