20177991

素因数分解:

$3^6\times {\mathrm{89}}^1\times {\mathrm{311}}^1$

素因数の和:418

約数の個数: 28

約数和(自身を含む): 30691440

約数和(自身を除く): 10513449

約数列:

[1, 3, 9, 27, 81, 89, 243, 267, 311, 729, 801, 933, 2403, 2799, 7209, 8397, 21627, 25191, 27679, 64881, 75573, 83037, 226719, 249111, 747333, 2241999, 6725997, 20177991]

約数ペア:

[(1, 20177991), (3, 6725997), (9, 2241999), (27, 747333), (81, 249111), (89, 226719), (243, 83037), (267, 75573), (311, 64881), (729, 27679), (801, 25191), (933, 21627), (2403, 8397), (2799, 7209)]