20528080209

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2784979}}^1$

素因数の和:2785011

約数の個数: 40

約数和(自身を含む): 37742048960

約数和(自身を除く): 17213968751

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 7371, 2784979, 8354937, 19494853, 25064811, 36204727, 58484559, 75194433, 108614181, 175453677, 225583299, 253433089, 325842543, 526361031, 760299267, 977527629, 1579083093, 2280897801, 2932582887, 6842693403, 20528080209]

約数ペア:

[(1, 20528080209), (3, 6842693403), (7, 2932582887), (9, 2280897801), (13, 1579083093), (21, 977527629), (27, 760299267), (39, 526361031), (63, 325842543), (81, 253433089), (91, 225583299), (117, 175453677), (189, 108614181), (273, 75194433), (351, 58484559), (567, 36204727), (819, 25064811), (1053, 19494853), (2457, 8354937), (7371, 2784979)]