81021040

素因数分解:

$2^4\times 5^1\times {\mathrm{1012763}}^1$

素因数の和:1012776

約数の個数: 20

約数和(自身を含む): 188374104

約数和(自身を除く): 107353064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012763, 2025526, 4051052, 5063815, 8102104, 10127630, 16204208, 20255260, 40510520, 81021040]

約数ペア:

[(1, 81021040), (2, 40510520), (4, 20255260), (5, 16204208), (8, 10127630), (10, 8102104), (16, 5063815), (20, 4051052), (40, 2025526), (80, 1012763)]