80020840

素因数分解:

$2^3\times 5^1\times {\mathrm{2000521}}^1$

素因数の和:2000532

約数の個数: 16

約数和(自身を含む): 180046980

約数和(自身を除く): 100026140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2000521, 4001042, 8002084, 10002605, 16004168, 20005210, 40010420, 80020840]

約数ペア:

[(1, 80020840), (2, 40010420), (4, 20005210), (5, 16004168), (8, 10002605), (10, 8002084), (20, 4001042), (40, 2000521)]