21581901

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{277}}^1\times {\mathrm{787}}^1$

素因数の和:1081

約数の個数: 24

約数和(自身を含む): 34173984

約数和(自身を除く): 12592083

約数列:

[1, 3, 9, 11, 33, 99, 277, 787, 831, 2361, 2493, 3047, 7083, 8657, 9141, 25971, 27423, 77913, 217999, 653997, 1961991, 2397989, 7193967, 21581901]

約数ペア:

[(1, 21581901), (3, 7193967), (9, 2397989), (11, 1961991), (33, 653997), (99, 217999), (277, 77913), (787, 27423), (831, 25971), (2361, 9141), (2493, 8657), (3047, 7083)]