81947120

素因数分解:

$2^4\times 5^1\times {\mathrm{1024339}}^1$

素因数の和:1024352

約数の個数: 20

約数和(自身を含む): 190527240

約数和(自身を除く): 108580120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1024339, 2048678, 4097356, 5121695, 8194712, 10243390, 16389424, 20486780, 40973560, 81947120]

約数ペア:

[(1, 81947120), (2, 40973560), (4, 20486780), (5, 16389424), (8, 10243390), (10, 8194712), (16, 5121695), (20, 4097356), (40, 2048678), (80, 1024339)]