21516341

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{191}}^1$

素因数の和:246

約数の個数: 36

約数和(自身を含む): 29111040

約数和(自身を除く): 7594699

約数列:

[1, 7, 11, 19, 49, 77, 121, 133, 191, 209, 539, 847, 931, 1337, 1463, 2101, 2299, 3629, 5929, 9359, 10241, 14707, 16093, 23111, 25403, 39919, 102949, 112651, 161777, 177821, 279433, 439109, 1132439, 1956031, 3073763, 21516341]

約数ペア:

[(1, 21516341), (7, 3073763), (11, 1956031), (19, 1132439), (49, 439109), (77, 279433), (121, 177821), (133, 161777), (191, 112651), (209, 102949), (539, 39919), (847, 25403), (931, 23111), (1337, 16093), (1463, 14707), (2101, 10241), (2299, 9359), (3629, 5929)]