18640765

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{31}}^1$

素因数の和:118

約数の個数: 48

約数和(自身を含む): 28094976

約数和(自身を除く): 9454211

約数列:

[1, 5, 11, 13, 29, 31, 55, 65, 143, 145, 155, 319, 341, 377, 403, 715, 841, 899, 1595, 1705, 1885, 2015, 4147, 4205, 4433, 4495, 9251, 9889, 10933, 11687, 20735, 22165, 26071, 46255, 49445, 54665, 58435, 120263, 128557, 130355, 286781, 338923, 601315, 642785, 1433905, 1694615, 3728153, 18640765]

約数ペア:

[(1, 18640765), (5, 3728153), (11, 1694615), (13, 1433905), (29, 642785), (31, 601315), (55, 338923), (65, 286781), (143, 130355), (145, 128557), (155, 120263), (319, 58435), (341, 54665), (377, 49445), (403, 46255), (715, 26071), (841, 22165), (899, 20735), (1595, 11687), (1705, 10933), (1885, 9889), (2015, 9251), (4147, 4495), (4205, 4433)]