20805928

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1399}}^1$

素因数の和:1442

約数の個数: 48

約数和(自身を含む): 46116000

約数和(自身を除く): 25310072

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 143, 169, 286, 338, 572, 676, 1144, 1352, 1399, 1859, 2798, 3718, 5596, 7436, 11192, 14872, 15389, 18187, 30778, 36374, 61556, 72748, 123112, 145496, 200057, 236431, 400114, 472862, 800228, 945724, 1600456, 1891448, 2600741, 5201482, 10402964, 20805928]

約数ペア:

[(1, 20805928), (2, 10402964), (4, 5201482), (8, 2600741), (11, 1891448), (13, 1600456), (22, 945724), (26, 800228), (44, 472862), (52, 400114), (88, 236431), (104, 200057), (143, 145496), (169, 123112), (286, 72748), (338, 61556), (572, 36374), (676, 30778), (1144, 18187), (1352, 15389), (1399, 14872), (1859, 11192), (2798, 7436), (3718, 5596)]