20916189

素因数分解:

$3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1103}}^1$

素因数の和:1166

約数の個数: 36

約数和(自身を含む): 35994816

約数和(自身を除く): 15078627

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 301, 387, 441, 903, 1103, 2107, 2709, 3309, 6321, 7721, 9927, 18963, 23163, 47429, 54047, 69489, 142287, 162141, 332003, 426861, 486423, 996009, 2324021, 2988027, 6972063, 20916189]

約数ペア:

[(1, 20916189), (3, 6972063), (7, 2988027), (9, 2324021), (21, 996009), (43, 486423), (49, 426861), (63, 332003), (129, 162141), (147, 142287), (301, 69489), (387, 54047), (441, 47429), (903, 23163), (1103, 18963), (2107, 9927), (2709, 7721), (3309, 6321)]