20657156787

素因数分解:

$3^4\times {\mathrm{211}}^1\times {\mathrm{1208657}}^1$

素因数の和:1208880

約数の個数: 20

約数和(自身を含む): 31004495016

約数和(自身を除く): 10347338229

約数列:

[1, 3, 9, 27, 81, 211, 633, 1899, 5697, 17091, 1208657, 3625971, 10877913, 32633739, 97901217, 255026627, 765079881, 2295239643, 6885718929, 20657156787]

約数ペア:

[(1, 20657156787), (3, 6885718929), (9, 2295239643), (27, 765079881), (81, 255026627), (211, 97901217), (633, 32633739), (1899, 10877913), (5697, 3625971), (17091, 1208657)]