21990186

素因数分解:

$2^1\times 3^2\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{359}}^1$

素因数の和:491

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 27542934

約数列:

[1, 2, 3, 6, 9, 18, 41, 82, 83, 123, 166, 246, 249, 359, 369, 498, 718, 738, 747, 1077, 1494, 2154, 3231, 3403, 6462, 6806, 10209, 14719, 20418, 29438, 29797, 30627, 44157, 59594, 61254, 88314, 89391, 132471, 178782, 264942, 268173, 536346, 1221677, 2443354, 3665031, 7330062, 10995093, 21990186]

約数ペア:

[(1, 21990186), (2, 10995093), (3, 7330062), (6, 3665031), (9, 2443354), (18, 1221677), (41, 536346), (82, 268173), (83, 264942), (123, 178782), (166, 132471), (246, 89391), (249, 88314), (359, 61254), (369, 59594), (498, 44157), (718, 30627), (738, 29797), (747, 29438), (1077, 20418), (1494, 14719), (2154, 10209), (3231, 6806), (3403, 6462)]