21154221

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{1997}}^1$

素因数の和:2121

約数の個数: 24

約数和(自身を含む): 33662304

約数和(自身を除く): 12508083

約数列:

[1, 3, 9, 11, 33, 99, 107, 321, 963, 1177, 1997, 3531, 5991, 10593, 17973, 21967, 65901, 197703, 213679, 641037, 1923111, 2350469, 7051407, 21154221]

約数ペア:

[(1, 21154221), (3, 7051407), (9, 2350469), (11, 1923111), (33, 641037), (99, 213679), (107, 197703), (321, 65901), (963, 21967), (1177, 17973), (1997, 10593), (3531, 5991)]