21149163

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 36864256

約数和(自身を除く): 15715093

約数列:

[1, 3, 7, 9, 21, 37, 43, 63, 111, 129, 211, 259, 301, 333, 387, 633, 777, 903, 1477, 1591, 1899, 2331, 2709, 4431, 4773, 7807, 9073, 11137, 13293, 14319, 23421, 27219, 33411, 54649, 63511, 70263, 81657, 100233, 163947, 190533, 335701, 491841, 571599, 1007103, 2349907, 3021309, 7049721, 21149163]

約数ペア:

[(1, 21149163), (3, 7049721), (7, 3021309), (9, 2349907), (21, 1007103), (37, 571599), (43, 491841), (63, 335701), (111, 190533), (129, 163947), (211, 100233), (259, 81657), (301, 70263), (333, 63511), (387, 54649), (633, 33411), (777, 27219), (903, 23421), (1477, 14319), (1591, 13293), (1899, 11137), (2331, 9073), (2709, 7807), (4431, 4773)]