21161756

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{541}}^1$

素因数の和:690

約数の個数: 48

約数和(自身を含む): 46620672

約数和(自身を除く): 25458916

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 127, 154, 254, 308, 508, 541, 889, 1082, 1397, 1778, 2164, 2794, 3556, 3787, 5588, 5951, 7574, 9779, 11902, 15148, 19558, 23804, 39116, 41657, 68707, 83314, 137414, 166628, 274828, 480949, 755777, 961898, 1511554, 1923796, 3023108, 5290439, 10580878, 21161756]

約数ペア:

[(1, 21161756), (2, 10580878), (4, 5290439), (7, 3023108), (11, 1923796), (14, 1511554), (22, 961898), (28, 755777), (44, 480949), (77, 274828), (127, 166628), (154, 137414), (254, 83314), (308, 68707), (508, 41657), (541, 39116), (889, 23804), (1082, 19558), (1397, 15148), (1778, 11902), (2164, 9779), (2794, 7574), (3556, 5951), (3787, 5588)]