81007280

素因数分解:

$2^4\times 5^1\times {\mathrm{1012591}}^1$

素因数の和:1012604

約数の個数: 20

約数和(自身を含む): 188342112

約数和(自身を除く): 107334832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012591, 2025182, 4050364, 5062955, 8100728, 10125910, 16201456, 20251820, 40503640, 81007280]

約数ペア:

[(1, 81007280), (2, 40503640), (4, 20251820), (5, 16201456), (8, 10125910), (10, 8100728), (16, 5062955), (20, 4050364), (40, 2025182), (80, 1012591)]