28981719

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1619}}^1$

素因数の和:1661

約数の個数: 40

約数和(自身を含む): 49397040

約数和(自身を除く): 20415321

約数列:

[1, 3, 9, 13, 17, 27, 39, 51, 81, 117, 153, 221, 351, 459, 663, 1053, 1377, 1619, 1989, 4857, 5967, 14571, 17901, 21047, 27523, 43713, 63141, 82569, 131139, 189423, 247707, 357799, 568269, 743121, 1073397, 1704807, 2229363, 3220191, 9660573, 28981719]

約数ペア:

[(1, 28981719), (3, 9660573), (9, 3220191), (13, 2229363), (17, 1704807), (27, 1073397), (39, 743121), (51, 568269), (81, 357799), (117, 247707), (153, 189423), (221, 131139), (351, 82569), (459, 63141), (663, 43713), (1053, 27523), (1377, 21047), (1619, 17901), (1989, 14571), (4857, 5967)]