21481768

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{811}}^1$

素因数の和:878

約数の個数: 64

約数和(自身を含む): 51448320

約数和(自身を除く): 29966552

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 43, 44, 56, 77, 86, 88, 154, 172, 301, 308, 344, 473, 602, 616, 811, 946, 1204, 1622, 1892, 2408, 3244, 3311, 3784, 5677, 6488, 6622, 8921, 11354, 13244, 17842, 22708, 26488, 34873, 35684, 45416, 62447, 69746, 71368, 124894, 139492, 244111, 249788, 278984, 383603, 488222, 499576, 767206, 976444, 1534412, 1952888, 2685221, 3068824, 5370442, 10740884, 21481768]

約数ペア:

[(1, 21481768), (2, 10740884), (4, 5370442), (7, 3068824), (8, 2685221), (11, 1952888), (14, 1534412), (22, 976444), (28, 767206), (43, 499576), (44, 488222), (56, 383603), (77, 278984), (86, 249788), (88, 244111), (154, 139492), (172, 124894), (301, 71368), (308, 69746), (344, 62447), (473, 45416), (602, 35684), (616, 34873), (811, 26488), (946, 22708), (1204, 17842), (1622, 13244), (1892, 11354), (2408, 8921), (3244, 6622), (3311, 6488), (3784, 5677)]