18621981

素因数分解:

$3^4\times 7^1\times {\mathrm{32843}}^1$

素因数の和:32862

約数の個数: 20

約数和(自身を含む): 31792992

約数和(自身を除く): 13171011

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 32843, 98529, 229901, 295587, 689703, 886761, 2069109, 2660283, 6207327, 18621981]

約数ペア:

[(1, 18621981), (3, 6207327), (7, 2660283), (9, 2069109), (21, 886761), (27, 689703), (63, 295587), (81, 229901), (189, 98529), (567, 32843)]