21162295

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 33707520

約数和(自身を除く): 12545225

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 121, 133, 209, 263, 385, 605, 665, 847, 1045, 1315, 1463, 1841, 2299, 2893, 4235, 4997, 7315, 9205, 11495, 14465, 16093, 20251, 24985, 31823, 34979, 54967, 80465, 101255, 159115, 174895, 222761, 274835, 384769, 604637, 1113805, 1923845, 3023185, 4232459, 21162295]

約数ペア:

[(1, 21162295), (5, 4232459), (7, 3023185), (11, 1923845), (19, 1113805), (35, 604637), (55, 384769), (77, 274835), (95, 222761), (121, 174895), (133, 159115), (209, 101255), (263, 80465), (385, 54967), (605, 34979), (665, 31823), (847, 24985), (1045, 20251), (1315, 16093), (1463, 14465), (1841, 11495), (2299, 9205), (2893, 7315), (4235, 4997)]