81474680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:229

約数の個数: 128

約数和(自身を含む): 219732480

約数和(自身を除く): 138257800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 67, 70, 86, 101, 134, 140, 172, 202, 215, 268, 280, 301, 335, 344, 404, 430, 469, 505, 536, 602, 670, 707, 808, 860, 938, 1010, 1204, 1340, 1414, 1505, 1720, 1876, 2020, 2345, 2408, 2680, 2828, 2881, 3010, 3535, 3752, 4040, 4343, 4690, 5656, 5762, 6020, 6767, 7070, 8686, 9380, 11524, 12040, 13534, 14140, 14405, 17372, 18760, 20167, 21715, 23048, 27068, 28280, 28810, 30401, 33835, 34744, 40334, 43430, 47369, 54136, 57620, 60802, 67670, 80668, 86860, 94738, 100835, 115240, 121604, 135340, 152005, 161336, 173720, 189476, 201670, 236845, 243208, 270680, 290981, 304010, 378952, 403340, 473690, 581962, 608020, 806680, 947380, 1163924, 1216040, 1454905, 1894760, 2036867, 2327848, 2909810, 4073734, 5819620, 8147468, 10184335, 11639240, 16294936, 20368670, 40737340, 81474680]

約数ペア:

[(1, 81474680), (2, 40737340), (4, 20368670), (5, 16294936), (7, 11639240), (8, 10184335), (10, 8147468), (14, 5819620), (20, 4073734), (28, 2909810), (35, 2327848), (40, 2036867), (43, 1894760), (56, 1454905), (67, 1216040), (70, 1163924), (86, 947380), (101, 806680), (134, 608020), (140, 581962), (172, 473690), (202, 403340), (215, 378952), (268, 304010), (280, 290981), (301, 270680), (335, 243208), (344, 236845), (404, 201670), (430, 189476), (469, 173720), (505, 161336), (536, 152005), (602, 135340), (670, 121604), (707, 115240), (808, 100835), (860, 94738), (938, 86860), (1010, 80668), (1204, 67670), (1340, 60802), (1414, 57620), (1505, 54136), (1720, 47369), (1876, 43430), (2020, 40334), (2345, 34744), (2408, 33835), (2680, 30401), (2828, 28810), (2881, 28280), (3010, 27068), (3535, 23048), (3752, 21715), (4040, 20167), (4343, 18760), (4690, 17372), (5656, 14405), (5762, 14140), (6020, 13534), (6767, 12040), (7070, 11524), (8686, 9380)]