201221811

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{74279}}^1$

素因数の和:74335

約数の個数: 24

約数和(自身を含む): 339905280

約数和(自身を除く): 138683469

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 74279, 222837, 519953, 668511, 1559859, 3193997, 4679577, 9581991, 22357979, 28745973, 67073937, 201221811]

約数ペア:

[(1, 201221811), (3, 67073937), (7, 28745973), (9, 22357979), (21, 9581991), (43, 4679577), (63, 3193997), (129, 1559859), (301, 668511), (387, 519953), (903, 222837), (2709, 74279)]