20981511

素因数分解:

$3^4\times {\mathrm{431}}^1\times {\mathrm{601}}^1$

素因数の和:1044

約数の個数: 20

約数和(自身を含む): 31467744

約数和(自身を除く): 10486233

約数列:

[1, 3, 9, 27, 81, 431, 601, 1293, 1803, 3879, 5409, 11637, 16227, 34911, 48681, 259031, 777093, 2331279, 6993837, 20981511]

約数ペア:

[(1, 20981511), (3, 6993837), (9, 2331279), (27, 777093), (81, 259031), (431, 48681), (601, 34911), (1293, 16227), (1803, 11637), (3879, 5409)]