20881323

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{6427}}^1$

素因数の和:6471

約数の個数: 18

約数和(自身を含む): 31837884

約数和(自身を除く): 10956561

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 6427, 19281, 57843, 122113, 366339, 1099017, 2320147, 6960441, 20881323]

約数ペア:

[(1, 20881323), (3, 6960441), (9, 2320147), (19, 1099017), (57, 366339), (171, 122113), (361, 57843), (1083, 19281), (3249, 6427)]