81405513

素因数分解:

$3^3\times 7^2\times {\mathrm{37}}^1\times {\mathrm{1663}}^1$

素因数の和:1723

約数の個数: 48

約数和(自身を含む): 144168960

約数和(自身を除く): 62763447

約数列:

[1, 3, 7, 9, 21, 27, 37, 49, 63, 111, 147, 189, 259, 333, 441, 777, 999, 1323, 1663, 1813, 2331, 4989, 5439, 6993, 11641, 14967, 16317, 34923, 44901, 48951, 61531, 81487, 104769, 184593, 244461, 314307, 430717, 553779, 733383, 1292151, 1661337, 2200149, 3015019, 3876453, 9045057, 11629359, 27135171, 81405513]

約数ペア:

[(1, 81405513), (3, 27135171), (7, 11629359), (9, 9045057), (21, 3876453), (27, 3015019), (37, 2200149), (49, 1661337), (63, 1292151), (111, 733383), (147, 553779), (189, 430717), (259, 314307), (333, 244461), (441, 184593), (777, 104769), (999, 81487), (1323, 61531), (1663, 48951), (1813, 44901), (2331, 34923), (4989, 16317), (5439, 14967), (6993, 11641)]