1871991

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{191}}^1$

素因数の和:225

約数の個数: 30

約数和(自身を含む): 3089856

約数和(自身を除く): 1217865

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 121, 191, 297, 363, 573, 891, 1089, 1719, 2101, 3267, 5157, 6303, 9801, 15471, 18909, 23111, 56727, 69333, 170181, 207999, 623997, 1871991]

約数ペア:

[(1, 1871991), (3, 623997), (9, 207999), (11, 170181), (27, 69333), (33, 56727), (81, 23111), (99, 18909), (121, 15471), (191, 9801), (297, 6303), (363, 5157), (573, 3267), (891, 2101), (1089, 1719)]