261777987

素因数分解:

$3^4\times {\mathrm{1009}}^1\times {\mathrm{3203}}^1$

素因数の和:4224

約数の個数: 20

約数和(自身を含む): 391560840

約数和(自身を除く): 129782853

約数列:

[1, 3, 9, 27, 81, 1009, 3027, 3203, 9081, 9609, 27243, 28827, 81729, 86481, 259443, 3231827, 9695481, 29086443, 87259329, 261777987]

約数ペア:

[(1, 261777987), (3, 87259329), (9, 29086443), (27, 9695481), (81, 3231827), (1009, 259443), (3027, 86481), (3203, 81729), (9081, 28827), (9609, 27243)]