21071127

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 36312192

約数和(自身を除く): 15241065

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 83, 147, 157, 231, 249, 471, 539, 581, 913, 1099, 1617, 1727, 1743, 2739, 3297, 4067, 5181, 6391, 7693, 12089, 12201, 13031, 19173, 23079, 36267, 39093, 44737, 84623, 91217, 134211, 143341, 253869, 273651, 430023, 638519, 1003387, 1915557, 3010161, 7023709, 21071127]

約数ペア:

[(1, 21071127), (3, 7023709), (7, 3010161), (11, 1915557), (21, 1003387), (33, 638519), (49, 430023), (77, 273651), (83, 253869), (147, 143341), (157, 134211), (231, 91217), (249, 84623), (471, 44737), (539, 39093), (581, 36267), (913, 23079), (1099, 19173), (1617, 13031), (1727, 12201), (1743, 12089), (2739, 7693), (3297, 6391), (4067, 5181)]