20921980079

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{20901079}}^1$

素因数の和:20901110

約数の個数: 16

約数和(自身を含む): 28091051520

約数和(自身を除く): 7169071441

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 20901079, 146307553, 229911869, 271714027, 1609383083, 1901998189, 2988854297, 20921980079]

約数ペア:

[(1, 20921980079), (7, 2988854297), (11, 1901998189), (13, 1609383083), (77, 271714027), (91, 229911869), (143, 146307553), (1001, 20901079)]