21691293

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{401}}^1$

素因数の和:509

約数の個数: 32

約数和(自身を含む): 33317760

約数和(自身を除く): 11626467

約数列:

[1, 3, 13, 19, 39, 57, 73, 219, 247, 401, 741, 949, 1203, 1387, 2847, 4161, 5213, 7619, 15639, 18031, 22857, 29273, 54093, 87819, 99047, 297141, 380549, 556187, 1141647, 1668561, 7230431, 21691293]

約数ペア:

[(1, 21691293), (3, 7230431), (13, 1668561), (19, 1141647), (39, 556187), (57, 380549), (73, 297141), (219, 99047), (247, 87819), (401, 54093), (741, 29273), (949, 22857), (1203, 18031), (1387, 15639), (2847, 7619), (4161, 5213)]