20997063

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:205

約数の個数: 40

約数和(自身を含む): 32879088

約数和(自身を除く): 11882025

約数列:

[1, 3, 9, 27, 53, 67, 73, 81, 159, 201, 219, 477, 603, 657, 1431, 1809, 1971, 3551, 3869, 4293, 4891, 5427, 5913, 10653, 11607, 14673, 31959, 34821, 44019, 95877, 104463, 132057, 259223, 287631, 313389, 396171, 777669, 2333007, 6999021, 20997063]

約数ペア:

[(1, 20997063), (3, 6999021), (9, 2333007), (27, 777669), (53, 396171), (67, 313389), (73, 287631), (81, 259223), (159, 132057), (201, 104463), (219, 95877), (477, 44019), (603, 34821), (657, 31959), (1431, 14673), (1809, 11607), (1971, 10653), (3551, 5913), (3869, 5427), (4293, 4891)]