21821121

素因数分解:

$3^2\times 7^2\times {\mathrm{49481}}^1$

素因数の和:49501

約数の個数: 18

約数和(自身を含む): 36666162

約数和(自身を除く): 14845041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 49481, 148443, 346367, 445329, 1039101, 2424569, 3117303, 7273707, 21821121]

約数ペア:

[(1, 21821121), (3, 7273707), (7, 3117303), (9, 2424569), (21, 1039101), (49, 445329), (63, 346367), (147, 148443), (441, 49481)]