21230391

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4093}}^1$

素因数の和:4135

約数の個数: 32

約数和(自身を含む): 36682240

約数和(自身を除く): 15451849

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 4093, 5187, 12279, 28651, 53209, 77767, 85953, 159627, 233301, 372463, 544369, 1010971, 1117389, 1633107, 3032913, 7076797, 21230391]

約数ペア:

[(1, 21230391), (3, 7076797), (7, 3032913), (13, 1633107), (19, 1117389), (21, 1010971), (39, 544369), (57, 372463), (91, 233301), (133, 159627), (247, 85953), (273, 77767), (399, 53209), (741, 28651), (1729, 12279), (4093, 5187)]