81668660

素因数分解:

$2^2\times 5^1\times {\mathrm{1291}}^1\times {\mathrm{3163}}^1$

素因数の和:4463

約数の個数: 24

約数和(自身を含む): 171691296

約数和(自身を除く): 90022636

約数列:

[1, 2, 4, 5, 10, 20, 1291, 2582, 3163, 5164, 6326, 6455, 12652, 12910, 15815, 25820, 31630, 63260, 4083433, 8166866, 16333732, 20417165, 40834330, 81668660]

約数ペア:

[(1, 81668660), (2, 40834330), (4, 20417165), (5, 16333732), (10, 8166866), (20, 4083433), (1291, 63260), (2582, 31630), (3163, 25820), (5164, 15815), (6326, 12910), (6455, 12652)]