21508775561

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12440009}}^1$

素因数の和:12440048

約数の個数: 16

約数和(自身を含む): 27865622400

約数和(自身を除く): 6356846839

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12440009, 87080063, 161720117, 236360171, 1132040819, 1654521197, 3072682223, 21508775561]

約数ペア:

[(1, 21508775561), (7, 3072682223), (13, 1654521197), (19, 1132040819), (91, 236360171), (133, 161720117), (247, 87080063), (1729, 12440009)]