18171800

素因数分解:

$2^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2113}}^1$

素因数の和:2172

約数の個数: 48

約数和(自身を含む): 43252440

約数和(自身を除く): 25080640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 172, 200, 215, 344, 430, 860, 1075, 1720, 2113, 2150, 4226, 4300, 8452, 8600, 10565, 16904, 21130, 42260, 52825, 84520, 90859, 105650, 181718, 211300, 363436, 422600, 454295, 726872, 908590, 1817180, 2271475, 3634360, 4542950, 9085900, 18171800]

約数ペア:

[(1, 18171800), (2, 9085900), (4, 4542950), (5, 3634360), (8, 2271475), (10, 1817180), (20, 908590), (25, 726872), (40, 454295), (43, 422600), (50, 363436), (86, 211300), (100, 181718), (172, 105650), (200, 90859), (215, 84520), (344, 52825), (430, 42260), (860, 21130), (1075, 16904), (1720, 10565), (2113, 8600), (2150, 8452), (4226, 4300)]