21031227

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 37402560

約数和(自身を除く): 16371333

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 73, 119, 153, 219, 269, 357, 511, 657, 807, 1071, 1241, 1533, 1883, 2421, 3723, 4573, 4599, 5649, 8687, 11169, 13719, 16947, 19637, 26061, 32011, 41157, 58911, 78183, 96033, 137459, 176733, 288099, 333829, 412377, 1001487, 1237131, 2336803, 3004461, 7010409, 21031227]

約数ペア:

[(1, 21031227), (3, 7010409), (7, 3004461), (9, 2336803), (17, 1237131), (21, 1001487), (51, 412377), (63, 333829), (73, 288099), (119, 176733), (153, 137459), (219, 96033), (269, 78183), (357, 58911), (511, 41157), (657, 32011), (807, 26061), (1071, 19637), (1241, 16947), (1533, 13719), (1883, 11169), (2421, 8687), (3723, 5649), (4573, 4599)]