20720367

素因数分解:

$3^6\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:722

約数の個数: 28

約数和(自身を含む): 31836904

約数和(自身を除く): 11116537

約数列:

[1, 3, 9, 27, 43, 81, 129, 243, 387, 661, 729, 1161, 1983, 3483, 5949, 10449, 17847, 28423, 31347, 53541, 85269, 160623, 255807, 481869, 767421, 2302263, 6906789, 20720367]

約数ペア:

[(1, 20720367), (3, 6906789), (9, 2302263), (27, 767421), (43, 481869), (81, 255807), (129, 160623), (243, 85269), (387, 53541), (661, 31347), (729, 28423), (1161, 17847), (1983, 10449), (3483, 5949)]