20118969

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^2$

素因数の和:139

約数の個数: 48

約数和(自身を含む): 33922560

約数和(自身を除く): 13803591

約数列:

[1, 3, 9, 13, 27, 31, 39, 43, 93, 117, 129, 279, 351, 387, 403, 559, 837, 1161, 1209, 1333, 1677, 1849, 3627, 3999, 5031, 5547, 10881, 11997, 15093, 16641, 17329, 24037, 35991, 49923, 51987, 57319, 72111, 155961, 171957, 216333, 467883, 515871, 648999, 745147, 1547613, 2235441, 6706323, 20118969]

約数ペア:

[(1, 20118969), (3, 6706323), (9, 2235441), (13, 1547613), (27, 745147), (31, 648999), (39, 515871), (43, 467883), (93, 216333), (117, 171957), (129, 155961), (279, 72111), (351, 57319), (387, 51987), (403, 49923), (559, 35991), (837, 24037), (1161, 17329), (1209, 16641), (1333, 15093), (1677, 11997), (1849, 10881), (3627, 5547), (3999, 5031)]