20178851

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{503}}^1\times {\mathrm{521}}^1$

素因数の和:1042

約数の個数: 16

約数和(自身を含む): 25256448

約数和(自身を除く): 5077597

約数列:

[1, 7, 11, 77, 503, 521, 3521, 3647, 5533, 5731, 38731, 40117, 262063, 1834441, 2882693, 20178851]

約数ペア:

[(1, 20178851), (7, 2882693), (11, 1834441), (77, 262063), (503, 40117), (521, 38731), (3521, 5731), (3647, 5533)]