21394233

素因数分解:

$3^3\times 7^2\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:283

約数の個数: 48

約数和(自身を含む): 37464960

約数和(自身を除く): 16070727

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 103, 147, 157, 189, 309, 441, 471, 721, 927, 1099, 1323, 1413, 2163, 2781, 3297, 4239, 5047, 6489, 7693, 9891, 15141, 16171, 19467, 23079, 29673, 45423, 48513, 69237, 113197, 136269, 145539, 207711, 339591, 436617, 792379, 1018773, 2377137, 3056319, 7131411, 21394233]

約数ペア:

[(1, 21394233), (3, 7131411), (7, 3056319), (9, 2377137), (21, 1018773), (27, 792379), (49, 436617), (63, 339591), (103, 207711), (147, 145539), (157, 136269), (189, 113197), (309, 69237), (441, 48513), (471, 45423), (721, 29673), (927, 23079), (1099, 19467), (1323, 16171), (1413, 15141), (2163, 9891), (2781, 7693), (3297, 6489), (4239, 5047)]