128257640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{458063}}^1$

素因数の和:458081

約数の個数: 32

約数和(自身を含む): 329806080

約数和(自身を除く): 201548440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 458063, 916126, 1832252, 2290315, 3206441, 3664504, 4580630, 6412882, 9161260, 12825764, 16032205, 18322520, 25651528, 32064410, 64128820, 128257640]

約数ペア:

[(1, 128257640), (2, 64128820), (4, 32064410), (5, 25651528), (7, 18322520), (8, 16032205), (10, 12825764), (14, 9161260), (20, 6412882), (28, 4580630), (35, 3664504), (40, 3206441), (56, 2290315), (70, 1832252), (140, 916126), (280, 458063)]