128520721

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 158906880

約数和(自身を除く): 30386159

約数列:

[1, 7, 29, 37, 71, 203, 241, 259, 497, 1073, 1687, 2059, 2627, 6989, 7511, 8917, 14413, 17111, 18389, 48923, 62419, 76183, 119777, 258593, 496219, 533281, 633107, 1810151, 3473533, 4431749, 18360103, 128520721]

約数ペア:

[(1, 128520721), (7, 18360103), (29, 4431749), (37, 3473533), (71, 1810151), (203, 633107), (241, 533281), (259, 496219), (497, 258593), (1073, 119777), (1687, 76183), (2059, 62419), (2627, 48923), (6989, 18389), (7511, 17111), (8917, 14413)]