18640905

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 30841344

約数和(自身を除く): 12200439

約数列:

[1, 3, 5, 15, 47, 137, 141, 193, 235, 411, 579, 685, 705, 965, 2055, 2895, 6439, 9071, 19317, 26441, 27213, 32195, 45355, 79323, 96585, 132205, 136065, 396615, 1242727, 3728181, 6213635, 18640905]

約数ペア:

[(1, 18640905), (3, 6213635), (5, 3728181), (15, 1242727), (47, 396615), (137, 136065), (141, 132205), (193, 96585), (235, 79323), (411, 45355), (579, 32195), (685, 27213), (705, 26441), (965, 19317), (2055, 9071), (2895, 6439)]