21778984

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{63311}}^1$

素因数の和:63360

約数の個数: 16

約数和(自身を含む): 41785920

約数和(自身を除く): 20006936

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 63311, 126622, 253244, 506488, 2722373, 5444746, 10889492, 21778984]

約数ペア:

[(1, 21778984), (2, 10889492), (4, 5444746), (8, 2722373), (43, 506488), (86, 253244), (172, 126622), (344, 63311)]