20988072

素因数分解:

$2^3\times 3^4\times 7^2\times {\mathrm{661}}^1$

素因数の和:693

約数の個数: 120

約数和(自身を含む): 68487210

約数和(自身を除く): 47499138

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 27, 28, 36, 42, 49, 54, 56, 63, 72, 81, 84, 98, 108, 126, 147, 162, 168, 189, 196, 216, 252, 294, 324, 378, 392, 441, 504, 567, 588, 648, 661, 756, 882, 1134, 1176, 1322, 1323, 1512, 1764, 1983, 2268, 2644, 2646, 3528, 3966, 3969, 4536, 4627, 5288, 5292, 5949, 7932, 7938, 9254, 10584, 11898, 13881, 15864, 15876, 17847, 18508, 23796, 27762, 31752, 32389, 35694, 37016, 41643, 47592, 53541, 55524, 64778, 71388, 83286, 97167, 107082, 111048, 124929, 129556, 142776, 166572, 194334, 214164, 249858, 259112, 291501, 333144, 374787, 388668, 428328, 499716, 583002, 749574, 777336, 874503, 999432, 1166004, 1499148, 1749006, 2332008, 2623509, 2998296, 3498012, 5247018, 6996024, 10494036, 20988072]

約数ペア:

[(1, 20988072), (2, 10494036), (3, 6996024), (4, 5247018), (6, 3498012), (7, 2998296), (8, 2623509), (9, 2332008), (12, 1749006), (14, 1499148), (18, 1166004), (21, 999432), (24, 874503), (27, 777336), (28, 749574), (36, 583002), (42, 499716), (49, 428328), (54, 388668), (56, 374787), (63, 333144), (72, 291501), (81, 259112), (84, 249858), (98, 214164), (108, 194334), (126, 166572), (147, 142776), (162, 129556), (168, 124929), (189, 111048), (196, 107082), (216, 97167), (252, 83286), (294, 71388), (324, 64778), (378, 55524), (392, 53541), (441, 47592), (504, 41643), (567, 37016), (588, 35694), (648, 32389), (661, 31752), (756, 27762), (882, 23796), (1134, 18508), (1176, 17847), (1322, 15876), (1323, 15864), (1512, 13881), (1764, 11898), (1983, 10584), (2268, 9254), (2644, 7938), (2646, 7932), (3528, 5949), (3966, 5292), (3969, 5288), (4536, 4627)]