20933991

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:157

約数の個数: 64

約数和(自身を含む): 36467200

約数和(自身を除く): 15533209

約数列:

[1, 3, 9, 13, 19, 27, 39, 43, 57, 73, 117, 129, 171, 219, 247, 351, 387, 513, 559, 657, 741, 817, 949, 1161, 1387, 1677, 1971, 2223, 2451, 2847, 3139, 4161, 5031, 6669, 7353, 8541, 9417, 10621, 12483, 15093, 18031, 22059, 25623, 28251, 31863, 37449, 40807, 54093, 59641, 84753, 95589, 122421, 162279, 178923, 286767, 367263, 486837, 536769, 775333, 1101789, 1610307, 2325999, 6977997, 20933991]

約数ペア:

[(1, 20933991), (3, 6977997), (9, 2325999), (13, 1610307), (19, 1101789), (27, 775333), (39, 536769), (43, 486837), (57, 367263), (73, 286767), (117, 178923), (129, 162279), (171, 122421), (219, 95589), (247, 84753), (351, 59641), (387, 54093), (513, 40807), (559, 37449), (657, 31863), (741, 28251), (817, 25623), (949, 22059), (1161, 18031), (1387, 15093), (1677, 12483), (1971, 10621), (2223, 9417), (2451, 8541), (2847, 7353), (3139, 6669), (4161, 5031)]