21156088

素因数分解:

$2^3\times {\mathrm{97}}^1\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 40572000

約数和(自身を除く): 19415912

約数列:

[1, 2, 4, 8, 97, 137, 194, 199, 274, 388, 398, 548, 776, 796, 1096, 1592, 13289, 19303, 26578, 27263, 38606, 53156, 54526, 77212, 106312, 109052, 154424, 218104, 2644511, 5289022, 10578044, 21156088]

約数ペア:

[(1, 21156088), (2, 10578044), (4, 5289022), (8, 2644511), (97, 218104), (137, 154424), (194, 109052), (199, 106312), (274, 77212), (388, 54526), (398, 53156), (548, 38606), (776, 27263), (796, 26578), (1096, 19303), (1592, 13289)]