21999901

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{6079}}^1$

素因数の和:6144

約数の個数: 16

約数和(自身を含む): 28016640

約数和(自身を除く): 6016739

約数列:

[1, 7, 11, 47, 77, 329, 517, 3619, 6079, 42553, 66869, 285713, 468083, 1999991, 3142843, 21999901]

約数ペア:

[(1, 21999901), (7, 3142843), (11, 1999991), (47, 468083), (77, 285713), (329, 66869), (517, 42553), (3619, 6079)]