81285540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1879}}^1$

素因数の和:2001

約数の個数: 96

約数和(自身を含む): 262778880

約数和(自身を除く): 181493340

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 103, 105, 140, 206, 210, 309, 412, 420, 515, 618, 721, 1030, 1236, 1442, 1545, 1879, 2060, 2163, 2884, 3090, 3605, 3758, 4326, 5637, 6180, 7210, 7516, 8652, 9395, 10815, 11274, 13153, 14420, 18790, 21630, 22548, 26306, 28185, 37580, 39459, 43260, 52612, 56370, 65765, 78918, 112740, 131530, 157836, 193537, 197295, 263060, 387074, 394590, 580611, 774148, 789180, 967685, 1161222, 1354759, 1935370, 2322444, 2709518, 2903055, 3870740, 4064277, 5419036, 5806110, 6773795, 8128554, 11612220, 13547590, 16257108, 20321385, 27095180, 40642770, 81285540]

約数ペア:

[(1, 81285540), (2, 40642770), (3, 27095180), (4, 20321385), (5, 16257108), (6, 13547590), (7, 11612220), (10, 8128554), (12, 6773795), (14, 5806110), (15, 5419036), (20, 4064277), (21, 3870740), (28, 2903055), (30, 2709518), (35, 2322444), (42, 1935370), (60, 1354759), (70, 1161222), (84, 967685), (103, 789180), (105, 774148), (140, 580611), (206, 394590), (210, 387074), (309, 263060), (412, 197295), (420, 193537), (515, 157836), (618, 131530), (721, 112740), (1030, 78918), (1236, 65765), (1442, 56370), (1545, 52612), (1879, 43260), (2060, 39459), (2163, 37580), (2884, 28185), (3090, 26306), (3605, 22548), (3758, 21630), (4326, 18790), (5637, 14420), (6180, 13153), (7210, 11274), (7516, 10815), (8652, 9395)]