21881259

素因数分解:

$3^4\times {\mathrm{151}}^1\times {\mathrm{1789}}^1$

素因数の和:1952

約数の個数: 20

約数和(自身を含む): 32921680

約数和(自身を除く): 11040421

約数列:

[1, 3, 9, 27, 81, 151, 453, 1359, 1789, 4077, 5367, 12231, 16101, 48303, 144909, 270139, 810417, 2431251, 7293753, 21881259]

約数ペア:

[(1, 21881259), (3, 7293753), (9, 2431251), (27, 810417), (81, 270139), (151, 144909), (453, 48303), (1359, 16101), (1789, 12231), (4077, 5367)]