20377000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:140

約数の個数: 128

約数和(自身を含む): 56609280

約数和(自身を除く): 36232280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 41, 50, 56, 70, 71, 82, 100, 125, 140, 142, 164, 175, 200, 205, 250, 280, 284, 287, 328, 350, 355, 410, 497, 500, 568, 574, 700, 710, 820, 875, 994, 1000, 1025, 1148, 1400, 1420, 1435, 1640, 1750, 1775, 1988, 2050, 2296, 2485, 2840, 2870, 2911, 3500, 3550, 3976, 4100, 4970, 5125, 5740, 5822, 7000, 7100, 7175, 8200, 8875, 9940, 10250, 11480, 11644, 12425, 14200, 14350, 14555, 17750, 19880, 20377, 20500, 23288, 24850, 28700, 29110, 35500, 35875, 40754, 41000, 49700, 57400, 58220, 62125, 71000, 71750, 72775, 81508, 99400, 101885, 116440, 124250, 143500, 145550, 163016, 203770, 248500, 287000, 291100, 363875, 407540, 497000, 509425, 582200, 727750, 815080, 1018850, 1455500, 2037700, 2547125, 2911000, 4075400, 5094250, 10188500, 20377000]

約数ペア:

[(1, 20377000), (2, 10188500), (4, 5094250), (5, 4075400), (7, 2911000), (8, 2547125), (10, 2037700), (14, 1455500), (20, 1018850), (25, 815080), (28, 727750), (35, 582200), (40, 509425), (41, 497000), (50, 407540), (56, 363875), (70, 291100), (71, 287000), (82, 248500), (100, 203770), (125, 163016), (140, 145550), (142, 143500), (164, 124250), (175, 116440), (200, 101885), (205, 99400), (250, 81508), (280, 72775), (284, 71750), (287, 71000), (328, 62125), (350, 58220), (355, 57400), (410, 49700), (497, 41000), (500, 40754), (568, 35875), (574, 35500), (700, 29110), (710, 28700), (820, 24850), (875, 23288), (994, 20500), (1000, 20377), (1025, 19880), (1148, 17750), (1400, 14555), (1420, 14350), (1435, 14200), (1640, 12425), (1750, 11644), (1775, 11480), (1988, 10250), (2050, 9940), (2296, 8875), (2485, 8200), (2840, 7175), (2870, 7100), (2911, 7000), (3500, 5822), (3550, 5740), (3976, 5125), (4100, 4970)]