21999131

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{1367}}^1$

素因数の和:1415

約数の個数: 24

約数和(自身を含む): 29111040

約数和(自身を除く): 7111909

約数列:

[1, 7, 11, 19, 77, 121, 133, 209, 847, 1367, 1463, 2299, 9569, 15037, 16093, 25973, 105259, 165407, 181811, 285703, 1157849, 1999921, 3142733, 21999131]

約数ペア:

[(1, 21999131), (7, 3142733), (11, 1999921), (19, 1157849), (77, 285703), (121, 181811), (133, 165407), (209, 105259), (847, 25973), (1367, 16093), (1463, 15037), (2299, 9569)]