2178764721

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{21737}}^1$

素因数の和:21830

約数の個数: 48

約数和(自身を含む): 3779977344

約数和(自身を除く): 1601212623

約数列:

[1, 3, 7, 9, 21, 37, 43, 63, 111, 129, 259, 301, 333, 387, 777, 903, 1591, 2331, 2709, 4773, 11137, 14319, 21737, 33411, 65211, 100233, 152159, 195633, 456477, 804269, 934691, 1369431, 2412807, 2804073, 5629883, 6542837, 7238421, 8412219, 16889649, 19628511, 34583567, 50668947, 58885533, 103750701, 242084969, 311252103, 726254907, 2178764721]

約数ペア:

[(1, 2178764721), (3, 726254907), (7, 311252103), (9, 242084969), (21, 103750701), (37, 58885533), (43, 50668947), (63, 34583567), (111, 19628511), (129, 16889649), (259, 8412219), (301, 7238421), (333, 6542837), (387, 5629883), (777, 2804073), (903, 2412807), (1591, 1369431), (2331, 934691), (2709, 804269), (4773, 456477), (11137, 195633), (14319, 152159), (21737, 100233), (33411, 65211)]