128315920

素因数分解:

$2^4\times 5^1\times {\mathrm{1603949}}^1$

素因数の和:1603962

約数の個数: 20

約数和(自身を含む): 298334700

約数和(自身を除く): 170018780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1603949, 3207898, 6415796, 8019745, 12831592, 16039490, 25663184, 32078980, 64157960, 128315920]

約数ペア:

[(1, 128315920), (2, 64157960), (4, 32078980), (5, 25663184), (8, 16039490), (10, 12831592), (16, 8019745), (20, 6415796), (40, 3207898), (80, 1603949)]