21271167

素因数分解:

$3^4\times {\mathrm{313}}^1\times {\mathrm{839}}^1$

素因数の和:1164

約数の個数: 20

約数和(自身を含む): 31914960

約数和(自身を除く): 10643793

約数列:

[1, 3, 9, 27, 81, 313, 839, 939, 2517, 2817, 7551, 8451, 22653, 25353, 67959, 262607, 787821, 2363463, 7090389, 21271167]

約数ペア:

[(1, 21271167), (3, 7090389), (9, 2363463), (27, 787821), (81, 262607), (313, 67959), (839, 25353), (939, 22653), (2517, 8451), (2817, 7551)]