21885968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2447}}^1$

素因数の和:2511

約数の個数: 40

約数和(自身を含む): 46747008

約数和(自身を除く): 24861040

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2447, 4472, 4894, 8944, 9788, 19576, 31811, 39152, 63622, 105221, 127244, 210442, 254488, 420884, 508976, 841768, 1367873, 1683536, 2735746, 5471492, 10942984, 21885968]

約数ペア:

[(1, 21885968), (2, 10942984), (4, 5471492), (8, 2735746), (13, 1683536), (16, 1367873), (26, 841768), (43, 508976), (52, 420884), (86, 254488), (104, 210442), (172, 127244), (208, 105221), (344, 63622), (559, 39152), (688, 31811), (1118, 19576), (2236, 9788), (2447, 8944), (4472, 4894)]