21564565

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 29538432

約数和(自身を除く): 7973867

約数列:

[1, 5, 11, 41, 55, 73, 131, 205, 365, 451, 655, 803, 1441, 2255, 2993, 4015, 5371, 7205, 9563, 14965, 26855, 32923, 47815, 59081, 105193, 164615, 295405, 392083, 525965, 1960415, 4312913, 21564565]

約数ペア:

[(1, 21564565), (5, 4312913), (11, 1960415), (41, 525965), (55, 392083), (73, 295405), (131, 164615), (205, 105193), (365, 59081), (451, 47815), (655, 32923), (803, 26855), (1441, 14965), (2255, 9563), (2993, 7205), (4015, 5371)]