81795920

素因数分解:

$2^4\times 5^1\times {\mathrm{1022449}}^1$

素因数の和:1022462

約数の個数: 20

約数和(自身を含む): 190175700

約数和(自身を除く): 108379780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1022449, 2044898, 4089796, 5112245, 8179592, 10224490, 16359184, 20448980, 40897960, 81795920]

約数ペア:

[(1, 81795920), (2, 40897960), (4, 20448980), (5, 16359184), (8, 10224490), (10, 8179592), (16, 5112245), (20, 4089796), (40, 2044898), (80, 1022449)]