17921780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8221}}^1$

素因数の和:8339

約数の個数: 24

約数和(自身を含む): 37985640

約数和(自身を除く): 20063860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8221, 16442, 32884, 41105, 82210, 164420, 896089, 1792178, 3584356, 4480445, 8960890, 17921780]

約数ペア:

[(1, 17921780), (2, 8960890), (4, 4480445), (5, 3584356), (10, 1792178), (20, 896089), (109, 164420), (218, 82210), (436, 41105), (545, 32884), (1090, 16442), (2180, 8221)]