81911.00000000

素因数分解:

$3^7\times 7^1\times {\mathrm{991}}^1$

素因数の和:1019

約数の個数: 32

約数和(自身を含む): 26030080

約数和(自身を除く): 10858861

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 991, 1701, 2187, 2973, 5103, 6937, 8919, 15309, 20811, 26757, 62433, 80271, 187299, 240813, 561897, 722439, 1685691, 2167317, 5057073, 15171219]

約数ペア:

[(1, 15171219), (3, 5057073), (7, 2167317), (9, 1685691), (21, 722439), (27, 561897), (63, 240813), (81, 187299), (189, 80271), (243, 62433), (567, 26757), (729, 20811), (991, 15309), (1701, 8919), (2187, 6937), (2973, 5103)]