21254216

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{317}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 43931700

約数和(自身を除く): 22677484

約数列:

[1, 2, 4, 8, 17, 29, 34, 58, 68, 116, 136, 232, 289, 317, 493, 578, 634, 986, 1156, 1268, 1972, 2312, 2536, 3944, 5389, 8381, 9193, 10778, 16762, 18386, 21556, 33524, 36772, 43112, 67048, 73544, 91613, 156281, 183226, 312562, 366452, 625124, 732904, 1250248, 2656777, 5313554, 10627108, 21254216]

約数ペア:

[(1, 21254216), (2, 10627108), (4, 5313554), (8, 2656777), (17, 1250248), (29, 732904), (34, 625124), (58, 366452), (68, 312562), (116, 183226), (136, 156281), (232, 91613), (289, 73544), (317, 67048), (493, 43112), (578, 36772), (634, 33524), (986, 21556), (1156, 18386), (1268, 16762), (1972, 10778), (2312, 9193), (2536, 8381), (3944, 5389)]