20728617

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{10847}}^1$

素因数の和:10877

約数の個数: 24

約数和(自身を含む): 34626816

約数和(自身を除く): 13898199

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 10847, 32541, 75929, 141011, 227787, 423033, 531503, 987077, 1594509, 2961231, 6909539, 20728617]

約数ペア:

[(1, 20728617), (3, 6909539), (7, 2961231), (13, 1594509), (21, 987077), (39, 531503), (49, 423033), (91, 227787), (147, 141011), (273, 75929), (637, 32541), (1911, 10847)]