21216897

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20149}}^1$

素因数の和:20174

約数の個数: 20

約数和(自身を含む): 34134100

約数和(自身を除く): 12917203

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20149, 60447, 181341, 261937, 544023, 785811, 1632069, 2357433, 7072299, 21216897]

約数ペア:

[(1, 21216897), (3, 7072299), (9, 2357433), (13, 1632069), (27, 785811), (39, 544023), (81, 261937), (117, 181341), (351, 60447), (1053, 20149)]