21328731

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18371}}^1$

素因数の和:18423

約数の個数: 16

約数和(自身を含む): 32334720

約数和(自身を除く): 11005989

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18371, 55113, 165339, 496017, 789953, 2369859, 7109577, 21328731]

約数ペア:

[(1, 21328731), (3, 7109577), (9, 2369859), (27, 789953), (43, 496017), (129, 165339), (387, 55113), (1161, 18371)]