21258853

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{1321}}^1$

素因数の和:1369

約数の個数: 24

約数和(自身を含む): 28132160

約数和(自身を除く): 6873307

約数列:

[1, 7, 11, 19, 77, 121, 133, 209, 847, 1321, 1463, 2299, 9247, 14531, 16093, 25099, 101717, 159841, 175693, 276089, 1118887, 1932623, 3036979, 21258853]

約数ペア:

[(1, 21258853), (7, 3036979), (11, 1932623), (19, 1118887), (77, 276089), (121, 175693), (133, 159841), (209, 101717), (847, 25099), (1321, 16093), (1463, 14531), (2299, 9247)]