28108971

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 48660480

約数和(自身を除く): 20551509

約数列:

[1, 3, 9, 11, 27, 31, 33, 43, 71, 93, 99, 129, 213, 279, 297, 341, 387, 473, 639, 781, 837, 1023, 1161, 1333, 1419, 1917, 2201, 2343, 3053, 3069, 3999, 4257, 6603, 7029, 9159, 9207, 11997, 12771, 14663, 19809, 21087, 24211, 27477, 33583, 35991, 43989, 59427, 72633, 82431, 94643, 100749, 131967, 217899, 283929, 302247, 395901, 653697, 851787, 906741, 1041073, 2555361, 3123219, 9369657, 28108971]

約数ペア:

[(1, 28108971), (3, 9369657), (9, 3123219), (11, 2555361), (27, 1041073), (31, 906741), (33, 851787), (43, 653697), (71, 395901), (93, 302247), (99, 283929), (129, 217899), (213, 131967), (279, 100749), (297, 94643), (341, 82431), (387, 72633), (473, 59427), (639, 43989), (781, 35991), (837, 33583), (1023, 27477), (1161, 24211), (1333, 21087), (1419, 19809), (1917, 14663), (2201, 12771), (2343, 11997), (3053, 9207), (3069, 9159), (3999, 7029), (4257, 6603)]