20520081

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{359}}^1$

素因数の和:470

約数の個数: 32

約数和(自身を含む): 31968000

約数和(自身を除く): 11447919

約数列:

[1, 3, 9, 27, 29, 73, 87, 219, 261, 359, 657, 783, 1077, 1971, 2117, 3231, 6351, 9693, 10411, 19053, 26207, 31233, 57159, 78621, 93699, 235863, 281097, 707589, 760003, 2280009, 6840027, 20520081]

約数ペア:

[(1, 20520081), (3, 6840027), (9, 2280009), (27, 760003), (29, 707589), (73, 281097), (87, 235863), (219, 93699), (261, 78621), (359, 57159), (657, 31233), (783, 26207), (1077, 19053), (1971, 10411), (2117, 9693), (3231, 6351)]