20728522087

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{664099}}^1$

素因数の和:664140

約数の個数: 20

約数和(自身を含む): 26042017400

約数和(自身を除く): 5313495313

約数列:

[1, 7, 13, 49, 91, 343, 637, 2401, 4459, 31213, 664099, 4648693, 8633287, 32540851, 60433009, 227785957, 423031063, 1594501699, 2961217441, 20728522087]

約数ペア:

[(1, 20728522087), (7, 2961217441), (13, 1594501699), (49, 423031063), (91, 227785957), (343, 60433009), (637, 32540851), (2401, 8633287), (4459, 4648693), (31213, 664099)]