21234879

素因数分解:

$3^4\times {\mathrm{317}}^1\times {\mathrm{827}}^1$

素因数の和:1156

約数の個数: 20

約数和(自身を含む): 31859784

約数和(自身を除く): 10624905

約数列:

[1, 3, 9, 27, 81, 317, 827, 951, 2481, 2853, 7443, 8559, 22329, 25677, 66987, 262159, 786477, 2359431, 7078293, 21234879]

約数ペア:

[(1, 21234879), (3, 7078293), (9, 2359431), (27, 786477), (81, 262159), (317, 66987), (827, 25677), (951, 22329), (2481, 8559), (2853, 7443)]