20421687

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{263}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 32288256

約数和(自身を除く): 11866569

約数列:

[1, 3, 11, 13, 33, 39, 143, 181, 263, 429, 543, 789, 1991, 2353, 2893, 3419, 5973, 7059, 8679, 10257, 25883, 37609, 47603, 77649, 112827, 142809, 523633, 618839, 1570899, 1856517, 6807229, 20421687]

約数ペア:

[(1, 20421687), (3, 6807229), (11, 1856517), (13, 1570899), (33, 618839), (39, 523633), (143, 142809), (181, 112827), (263, 77649), (429, 47603), (543, 37609), (789, 25883), (1991, 10257), (2353, 8679), (2893, 7059), (3419, 5973)]