20881756

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{11131}}^1$

素因数の和:11209

約数の個数: 24

約数和(自身を含む): 42390656

約数和(自身を除く): 21508900

約数列:

[1, 2, 4, 7, 14, 28, 67, 134, 268, 469, 938, 1876, 11131, 22262, 44524, 77917, 155834, 311668, 745777, 1491554, 2983108, 5220439, 10440878, 20881756]

約数ペア:

[(1, 20881756), (2, 10440878), (4, 5220439), (7, 2983108), (14, 1491554), (28, 745777), (67, 311668), (134, 155834), (268, 77917), (469, 44524), (938, 22262), (1876, 11131)]