21090418

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{2789}}^1$

素因数の和:3009

約数の個数: 16

約数和(自身を含む): 33480000

約数和(自身を除く): 12389582

約数列:

[1, 2, 19, 38, 199, 398, 2789, 3781, 5578, 7562, 52991, 105982, 555011, 1110022, 10545209, 21090418]

約数ペア:

[(1, 21090418), (2, 10545209), (19, 1110022), (38, 555011), (199, 105982), (398, 52991), (2789, 7562), (3781, 5578)]