20917468

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 45193680

約数和(自身を除く): 24276212

約数列:

[1, 2, 4, 11, 13, 22, 26, 29, 44, 52, 58, 97, 116, 143, 169, 194, 286, 319, 338, 377, 388, 572, 638, 676, 754, 1067, 1261, 1276, 1508, 1859, 2134, 2522, 2813, 3718, 4147, 4268, 4901, 5044, 5626, 7436, 8294, 9802, 11252, 13871, 16393, 16588, 19604, 27742, 30943, 32786, 36569, 53911, 55484, 61886, 65572, 73138, 107822, 123772, 146276, 180323, 215644, 360646, 402259, 475397, 721292, 804518, 950794, 1609036, 1901588, 5229367, 10458734, 20917468]

約数ペア:

[(1, 20917468), (2, 10458734), (4, 5229367), (11, 1901588), (13, 1609036), (22, 950794), (26, 804518), (29, 721292), (44, 475397), (52, 402259), (58, 360646), (97, 215644), (116, 180323), (143, 146276), (169, 123772), (194, 107822), (286, 73138), (319, 65572), (338, 61886), (377, 55484), (388, 53911), (572, 36569), (638, 32786), (676, 30943), (754, 27742), (1067, 19604), (1261, 16588), (1276, 16393), (1508, 13871), (1859, 11252), (2134, 9802), (2522, 8294), (2813, 7436), (3718, 5626), (4147, 5044), (4268, 4901)]