1555540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{271}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 3838464

約数和(自身を除く): 2282924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 271, 287, 410, 542, 574, 820, 1084, 1148, 1355, 1435, 1897, 2710, 2870, 3794, 5420, 5740, 7588, 9485, 11111, 18970, 22222, 37940, 44444, 55555, 77777, 111110, 155554, 222220, 311108, 388885, 777770, 1555540]

約数ペア:

[(1, 1555540), (2, 777770), (4, 388885), (5, 311108), (7, 222220), (10, 155554), (14, 111110), (20, 77777), (28, 55555), (35, 44444), (41, 37940), (70, 22222), (82, 18970), (140, 11111), (164, 9485), (205, 7588), (271, 5740), (287, 5420), (410, 3794), (542, 2870), (574, 2710), (820, 1897), (1084, 1435), (1148, 1355)]