20909421

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{6619}}^1$

素因数の和:6647

約数の個数: 24

約数和(自身を含む): 33735520

約数和(自身を除く): 12826099

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 1053, 3159, 6619, 19857, 59571, 86047, 178713, 258141, 536139, 774423, 1608417, 2323269, 6969807, 20909421]

約数ペア:

[(1, 20909421), (3, 6969807), (9, 2323269), (13, 1608417), (27, 774423), (39, 536139), (81, 258141), (117, 178713), (243, 86047), (351, 59571), (1053, 19857), (3159, 6619)]