21189784

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{839}}^1$

素因数の和:904

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29613416

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 41, 44, 56, 77, 82, 88, 154, 164, 287, 308, 328, 451, 574, 616, 839, 902, 1148, 1678, 1804, 2296, 3157, 3356, 3608, 5873, 6314, 6712, 9229, 11746, 12628, 18458, 23492, 25256, 34399, 36916, 46984, 64603, 68798, 73832, 129206, 137596, 240793, 258412, 275192, 378389, 481586, 516824, 756778, 963172, 1513556, 1926344, 2648723, 3027112, 5297446, 10594892, 21189784]

約数ペア:

[(1, 21189784), (2, 10594892), (4, 5297446), (7, 3027112), (8, 2648723), (11, 1926344), (14, 1513556), (22, 963172), (28, 756778), (41, 516824), (44, 481586), (56, 378389), (77, 275192), (82, 258412), (88, 240793), (154, 137596), (164, 129206), (287, 73832), (308, 68798), (328, 64603), (451, 46984), (574, 36916), (616, 34399), (839, 25256), (902, 23492), (1148, 18458), (1678, 12628), (1804, 11746), (2296, 9229), (3157, 6712), (3356, 6314), (3608, 5873)]