20291391

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8081}}^1$

素因数の和:8124

約数の個数: 20

約数和(自身を含む): 31293504

約数和(自身を除く): 11002113

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8081, 24243, 72729, 218187, 250511, 654561, 751533, 2254599, 6763797, 20291391]

約数ペア:

[(1, 20291391), (3, 6763797), (9, 2254599), (27, 751533), (31, 654561), (81, 250511), (93, 218187), (279, 72729), (837, 24243), (2511, 8081)]