15989720

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{3881}}^1$

素因数の和:3995

約数の個数: 32

約数和(自身を含む): 36335520

約数和(自身を除く): 20345800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 3881, 4120, 7762, 15524, 19405, 31048, 38810, 77620, 155240, 399743, 799486, 1598972, 1998715, 3197944, 3997430, 7994860, 15989720]

約数ペア:

[(1, 15989720), (2, 7994860), (4, 3997430), (5, 3197944), (8, 1998715), (10, 1598972), (20, 799486), (40, 399743), (103, 155240), (206, 77620), (412, 38810), (515, 31048), (824, 19405), (1030, 15524), (2060, 7762), (3881, 4120)]