19521680

素因数分解:

$2^4\times 5^1\times {\mathrm{244021}}^1$

素因数の和:244034

約数の個数: 20

約数和(自身を含む): 45388092

約数和(自身を除く): 25866412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 244021, 488042, 976084, 1220105, 1952168, 2440210, 3904336, 4880420, 9760840, 19521680]

約数ペア:

[(1, 19521680), (2, 9760840), (4, 4880420), (5, 3904336), (8, 2440210), (10, 1952168), (16, 1220105), (20, 976084), (40, 488042), (80, 244021)]