28391909

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{16421}}^1$

素因数の和:16460

約数の個数: 16

約数和(自身を含む): 36785280

約数和(自身を除く): 8393371

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 16421, 114947, 213473, 311999, 1494311, 2183993, 4055987, 28391909]

約数ペア:

[(1, 28391909), (7, 4055987), (13, 2183993), (19, 1494311), (91, 311999), (133, 213473), (247, 114947), (1729, 16421)]