20217488

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{311}}^1$

素因数の和:575

約数の個数: 40

約数和(自身を含む): 41783040

約数和(自身を除く): 21565552

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 239, 272, 311, 478, 622, 956, 1244, 1912, 2488, 3824, 4063, 4976, 5287, 8126, 10574, 16252, 21148, 32504, 42296, 65008, 74329, 84592, 148658, 297316, 594632, 1189264, 1263593, 2527186, 5054372, 10108744, 20217488]

約数ペア:

[(1, 20217488), (2, 10108744), (4, 5054372), (8, 2527186), (16, 1263593), (17, 1189264), (34, 594632), (68, 297316), (136, 148658), (239, 84592), (272, 74329), (311, 65008), (478, 42296), (622, 32504), (956, 21148), (1244, 16252), (1912, 10574), (2488, 8126), (3824, 5287), (4063, 4976)]