21288177

素因数分解:

$3^4\times {\mathrm{89}}^1\times {\mathrm{2953}}^1$

素因数の和:3054

約数の個数: 20

約数和(自身を含む): 32169060

約数和(自身を除く): 10880883

約数列:

[1, 3, 9, 27, 81, 89, 267, 801, 2403, 2953, 7209, 8859, 26577, 79731, 239193, 262817, 788451, 2365353, 7096059, 21288177]

約数ペア:

[(1, 21288177), (3, 7096059), (9, 2365353), (27, 788451), (81, 262817), (89, 239193), (267, 79731), (801, 26577), (2403, 8859), (2953, 7209)]