21195999

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{23789}}^1$

素因数の和:23812

約数の個数: 20

約数和(自身を含む): 34543080

約数和(自身を除く): 13347081

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 891, 23789, 71367, 214101, 261679, 642303, 785037, 1926909, 2355111, 7065333, 21195999]

約数ペア:

[(1, 21195999), (3, 7065333), (9, 2355111), (11, 1926909), (27, 785037), (33, 642303), (81, 261679), (99, 214101), (297, 71367), (891, 23789)]