81380768

素因数分解:

$2^5\times 7^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:155

約数の個数: 144

約数和(自身を含む): 204773184

約数和(自身を除く): 123392416

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 32, 34, 43, 49, 56, 68, 71, 86, 98, 112, 119, 136, 142, 172, 196, 224, 238, 272, 284, 301, 344, 392, 476, 497, 544, 568, 602, 688, 731, 784, 833, 952, 994, 1136, 1204, 1207, 1376, 1462, 1568, 1666, 1904, 1988, 2107, 2272, 2408, 2414, 2924, 3053, 3332, 3479, 3808, 3976, 4214, 4816, 4828, 5117, 5848, 6106, 6664, 6958, 7952, 8428, 8449, 9632, 9656, 10234, 11696, 12212, 13328, 13916, 15904, 16856, 16898, 19312, 20468, 21371, 23392, 24424, 26656, 27832, 33712, 33796, 35819, 38624, 40936, 42742, 48848, 51901, 55664, 59143, 67424, 67592, 71638, 81872, 85484, 97696, 103802, 111328, 118286, 135184, 143276, 149597, 163744, 170968, 207604, 236572, 270368, 286552, 299194, 341936, 363307, 415208, 473144, 573104, 598388, 683872, 726614, 830416, 946288, 1146208, 1196776, 1453228, 1660832, 1892576, 2393552, 2543149, 2906456, 4787104, 5086298, 5812912, 10172596, 11625824, 20345192, 40690384, 81380768]

約数ペア:

[(1, 81380768), (2, 40690384), (4, 20345192), (7, 11625824), (8, 10172596), (14, 5812912), (16, 5086298), (17, 4787104), (28, 2906456), (32, 2543149), (34, 2393552), (43, 1892576), (49, 1660832), (56, 1453228), (68, 1196776), (71, 1146208), (86, 946288), (98, 830416), (112, 726614), (119, 683872), (136, 598388), (142, 573104), (172, 473144), (196, 415208), (224, 363307), (238, 341936), (272, 299194), (284, 286552), (301, 270368), (344, 236572), (392, 207604), (476, 170968), (497, 163744), (544, 149597), (568, 143276), (602, 135184), (688, 118286), (731, 111328), (784, 103802), (833, 97696), (952, 85484), (994, 81872), (1136, 71638), (1204, 67592), (1207, 67424), (1376, 59143), (1462, 55664), (1568, 51901), (1666, 48848), (1904, 42742), (1988, 40936), (2107, 38624), (2272, 35819), (2408, 33796), (2414, 33712), (2924, 27832), (3053, 26656), (3332, 24424), (3479, 23392), (3808, 21371), (3976, 20468), (4214, 19312), (4816, 16898), (4828, 16856), (5117, 15904), (5848, 13916), (6106, 13328), (6664, 12212), (6958, 11696), (7952, 10234), (8428, 9656), (8449, 9632)]