19987121

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{15269}}^1$

素因数の和:15304

約数の個数: 16

約数和(自身を含む): 26386560

約数和(自身を除く): 6399439

約数列:

[1, 7, 11, 17, 77, 119, 187, 1309, 15269, 106883, 167959, 259573, 1175713, 1817011, 2855303, 19987121]

約数ペア:

[(1, 19987121), (7, 2855303), (11, 1817011), (17, 1175713), (77, 259573), (119, 167959), (187, 106883), (1309, 15269)]