81305289

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{77213}}^1$

素因数の和:77238

約数の個数: 20

約数和(自身を含む): 130800516

約数和(自身を除く): 49495227

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 77213, 231639, 694917, 1003769, 2084751, 3011307, 6254253, 9033921, 27101763, 81305289]

約数ペア:

[(1, 81305289), (3, 27101763), (9, 9033921), (13, 6254253), (27, 3011307), (39, 2084751), (81, 1003769), (117, 694917), (351, 231639), (1053, 77213)]