21005541

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1$

素因数の和:370

約数の個数: 32

約数和(自身を含む): 32592000

約数和(自身を除く): 11586459

約数列:

[1, 3, 9, 27, 29, 87, 139, 193, 261, 417, 579, 783, 1251, 1737, 3753, 4031, 5211, 5597, 12093, 16791, 26827, 36279, 50373, 80481, 108837, 151119, 241443, 724329, 777983, 2333949, 7001847, 21005541]

約数ペア:

[(1, 21005541), (3, 7001847), (9, 2333949), (27, 777983), (29, 724329), (87, 241443), (139, 151119), (193, 108837), (261, 80481), (417, 50373), (579, 36279), (783, 26827), (1251, 16791), (1737, 12093), (3753, 5597), (4031, 5211)]