21706569

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{131}}^1$

素因数の和:195

約数の個数: 48

約数和(自身を含む): 36210240

約数和(自身を除く): 14503671

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 131, 153, 171, 323, 361, 393, 459, 513, 969, 1083, 1179, 2227, 2489, 2907, 3249, 3537, 6137, 6681, 7467, 8721, 9747, 18411, 20043, 22401, 42313, 47291, 55233, 60129, 67203, 126939, 141873, 165699, 380817, 425619, 803947, 1142451, 1276857, 2411841, 7235523, 21706569]

約数ペア:

[(1, 21706569), (3, 7235523), (9, 2411841), (17, 1276857), (19, 1142451), (27, 803947), (51, 425619), (57, 380817), (131, 165699), (153, 141873), (171, 126939), (323, 67203), (361, 60129), (393, 55233), (459, 47291), (513, 42313), (969, 22401), (1083, 20043), (1179, 18411), (2227, 9747), (2489, 8721), (2907, 7467), (3249, 6681), (3537, 6137)]