28739781

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{103}}^2$

素因数の和:262

約数の個数: 36

約数和(自身を含む): 49022688

約数和(自身を除く): 20282907

約数列:

[1, 3, 7, 9, 21, 43, 63, 103, 129, 301, 309, 387, 721, 903, 927, 2163, 2709, 4429, 6489, 10609, 13287, 31003, 31827, 39861, 74263, 93009, 95481, 222789, 279027, 456187, 668367, 1368561, 3193309, 4105683, 9579927, 28739781]

約数ペア:

[(1, 28739781), (3, 9579927), (7, 4105683), (9, 3193309), (21, 1368561), (43, 668367), (63, 456187), (103, 279027), (129, 222789), (301, 95481), (309, 93009), (387, 74263), (721, 39861), (903, 31827), (927, 31003), (2163, 13287), (2709, 10609), (4429, 6489)]