19407921

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 29094912

約数和(自身を除く): 9686991

約数列:

[1, 3, 13, 39, 43, 71, 129, 163, 213, 489, 559, 923, 1677, 2119, 2769, 3053, 6357, 7009, 9159, 11573, 21027, 34719, 39689, 91117, 119067, 150449, 273351, 451347, 497639, 1492917, 6469307, 19407921]

約数ペア:

[(1, 19407921), (3, 6469307), (13, 1492917), (39, 497639), (43, 451347), (71, 273351), (129, 150449), (163, 119067), (213, 91117), (489, 39689), (559, 34719), (923, 21027), (1677, 11573), (2119, 9159), (2769, 7009), (3053, 6357)]