19957784

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:384

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 27216616

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 154, 179, 181, 308, 358, 362, 616, 716, 724, 1253, 1267, 1432, 1448, 1969, 1991, 2506, 2534, 3938, 3982, 5012, 5068, 7876, 7964, 10024, 10136, 13783, 13937, 15752, 15928, 27566, 27874, 32399, 55132, 55748, 64798, 110264, 111496, 129596, 226793, 259192, 356389, 453586, 712778, 907172, 1425556, 1814344, 2494723, 2851112, 4989446, 9978892, 19957784]

約数ペア:

[(1, 19957784), (2, 9978892), (4, 4989446), (7, 2851112), (8, 2494723), (11, 1814344), (14, 1425556), (22, 907172), (28, 712778), (44, 453586), (56, 356389), (77, 259192), (88, 226793), (154, 129596), (179, 111496), (181, 110264), (308, 64798), (358, 55748), (362, 55132), (616, 32399), (716, 27874), (724, 27566), (1253, 15928), (1267, 15752), (1432, 13937), (1448, 13783), (1969, 10136), (1991, 10024), (2506, 7964), (2534, 7876), (3938, 5068), (3982, 5012)]