18711891

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{21001}}^1$

素因数の和:21024

約数の個数: 20

約数和(自身を含む): 30494904

約数和(自身を除く): 11783013

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 891, 21001, 63003, 189009, 231011, 567027, 693033, 1701081, 2079099, 6237297, 18711891]

約数ペア:

[(1, 18711891), (3, 6237297), (9, 2079099), (11, 1701081), (27, 693033), (33, 567027), (81, 231011), (99, 189009), (297, 63003), (891, 21001)]