21051655

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{997}}^1$

素因数の和:1146

約数の個数: 16

約数和(自身を含む): 26155584

約数和(自身を除く): 5103929

約数列:

[1, 5, 41, 103, 205, 515, 997, 4223, 4985, 21115, 40877, 102691, 204385, 513455, 4210331, 21051655]

約数ペア:

[(1, 21051655), (5, 4210331), (41, 513455), (103, 204385), (205, 102691), (515, 40877), (997, 21115), (4223, 4985)]