20747649

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^2$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 30989056

約数和(自身を除く): 10241407

約数列:

[1, 3, 13, 31, 39, 93, 131, 393, 403, 1209, 1703, 4061, 5109, 12183, 17161, 51483, 52793, 158379, 223093, 531991, 669279, 1595973, 6915883, 20747649]

約数ペア:

[(1, 20747649), (3, 6915883), (13, 1595973), (31, 669279), (39, 531991), (93, 223093), (131, 158379), (393, 52793), (403, 51483), (1209, 17161), (1703, 12183), (4061, 5109)]