20489481

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{103}}^1$

素因数の和:194

約数の個数: 36

約数和(自身を含む): 32220864

約数和(自身を除く): 11731383

約数列:

[1, 3, 9, 23, 31, 69, 93, 103, 207, 279, 309, 713, 927, 961, 2139, 2369, 2883, 3193, 6417, 7107, 8649, 9579, 21321, 22103, 28737, 66309, 73439, 98983, 198927, 220317, 296949, 660951, 890847, 2276609, 6829827, 20489481]

約数ペア:

[(1, 20489481), (3, 6829827), (9, 2276609), (23, 890847), (31, 660951), (69, 296949), (93, 220317), (103, 198927), (207, 98983), (279, 73439), (309, 66309), (713, 28737), (927, 22103), (961, 21321), (2139, 9579), (2369, 8649), (2883, 7107), (3193, 6417)]