7788978020

素因数分解:

$2^2\times 5^1\times {\mathrm{389448901}}^1$

素因数の和:389448910

約数の個数: 12

約数和(自身を含む): 16356853884

約数和(自身を除く): 8567875864

約数列:

[1, 2, 4, 5, 10, 20, 389448901, 778897802, 1557795604, 1947244505, 3894489010, 7788978020]

約数ペア:

[(1, 7788978020), (2, 3894489010), (4, 1947244505), (5, 1557795604), (10, 778897802), (20, 389448901)]