18821745

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 34100352

約数和(自身を除く): 15278607

約数列:

[1, 3, 5, 9, 15, 43, 45, 71, 129, 137, 213, 215, 355, 387, 411, 639, 645, 685, 1065, 1233, 1935, 2055, 3053, 3195, 5891, 6165, 9159, 9727, 15265, 17673, 27477, 29181, 29455, 45795, 48635, 53019, 87543, 88365, 137385, 145905, 265095, 418261, 437715, 1254783, 2091305, 3764349, 6273915, 18821745]

約数ペア:

[(1, 18821745), (3, 6273915), (5, 3764349), (9, 2091305), (15, 1254783), (43, 437715), (45, 418261), (71, 265095), (129, 145905), (137, 137385), (213, 88365), (215, 87543), (355, 53019), (387, 48635), (411, 45795), (639, 29455), (645, 29181), (685, 27477), (1065, 17673), (1233, 15265), (1935, 9727), (2055, 9159), (3053, 6165), (3195, 5891)]