21778011

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{191}}^1$

素因数の和:344

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 11768229

約数列:

[1, 3, 9, 27, 41, 103, 123, 191, 309, 369, 573, 927, 1107, 1719, 2781, 4223, 5157, 7831, 12669, 19673, 23493, 38007, 59019, 70479, 114021, 177057, 211437, 531171, 806593, 2419779, 7259337, 21778011]

約数ペア:

[(1, 21778011), (3, 7259337), (9, 2419779), (27, 806593), (41, 531171), (103, 211437), (123, 177057), (191, 114021), (309, 70479), (369, 59019), (573, 38007), (927, 23493), (1107, 19673), (1719, 12669), (2781, 7831), (4223, 5157)]