8649640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2141}}^1$

素因数の和:2253

約数の個数: 32

約数和(自身を含む): 19663560

約数和(自身を除く): 11013920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 2141, 4040, 4282, 8564, 10705, 17128, 21410, 42820, 85640, 216241, 432482, 864964, 1081205, 1729928, 2162410, 4324820, 8649640]

約数ペア:

[(1, 8649640), (2, 4324820), (4, 2162410), (5, 1729928), (8, 1081205), (10, 864964), (20, 432482), (40, 216241), (101, 85640), (202, 42820), (404, 21410), (505, 17128), (808, 10705), (1010, 8564), (2020, 4282), (2141, 4040)]