21040201

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{283}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 27991040

約数和(自身を除く): 6950839

約数列:

[1, 7, 13, 19, 43, 91, 133, 247, 283, 301, 559, 817, 1729, 1981, 3679, 3913, 5377, 5719, 10621, 12169, 25753, 37639, 69901, 74347, 85183, 158197, 231211, 489307, 1107379, 1618477, 3005743, 21040201]

約数ペア:

[(1, 21040201), (7, 3005743), (13, 1618477), (19, 1107379), (43, 489307), (91, 231211), (133, 158197), (247, 85183), (283, 74347), (301, 69901), (559, 37639), (817, 25753), (1729, 12169), (1981, 10621), (3679, 5719), (3913, 5377)]