28128579

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 40634880

約数和(自身を除く): 12506301

約数列:

[1, 3, 29, 43, 73, 87, 103, 129, 219, 309, 1247, 2117, 2987, 3139, 3741, 4429, 6351, 7519, 8961, 9417, 13287, 22557, 91031, 128441, 218051, 273093, 323317, 385323, 654153, 969951, 9376193, 28128579]

約数ペア:

[(1, 28128579), (3, 9376193), (29, 969951), (43, 654153), (73, 385323), (87, 323317), (103, 273093), (129, 218051), (219, 128441), (309, 91031), (1247, 22557), (2117, 13287), (2987, 9417), (3139, 8961), (3741, 7519), (4429, 6351)]