18578241

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{719}}^1$

素因数の和:771

約数の個数: 40

約数和(自身を含む): 31363200

約数和(自身を除く): 12784959

約数列:

[1, 3, 9, 11, 27, 29, 33, 81, 87, 99, 261, 297, 319, 719, 783, 891, 957, 2157, 2349, 2871, 6471, 7909, 8613, 19413, 20851, 23727, 25839, 58239, 62553, 71181, 187659, 213543, 229361, 562977, 640629, 688083, 1688931, 2064249, 6192747, 18578241]

約数ペア:

[(1, 18578241), (3, 6192747), (9, 2064249), (11, 1688931), (27, 688083), (29, 640629), (33, 562977), (81, 229361), (87, 213543), (99, 187659), (261, 71181), (297, 62553), (319, 58239), (719, 25839), (783, 23727), (891, 20851), (957, 19413), (2157, 8613), (2349, 7909), (2871, 6471)]