21088012

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{4397}}^1$

素因数の和:4521

約数の個数: 24

約数和(自身を含む): 40637520

約数和(自身を除く): 19549508

約数列:

[1, 2, 4, 11, 22, 44, 109, 218, 436, 1199, 2398, 4397, 4796, 8794, 17588, 48367, 96734, 193468, 479273, 958546, 1917092, 5272003, 10544006, 21088012]

約数ペア:

[(1, 21088012), (2, 10544006), (4, 5272003), (11, 1917092), (22, 958546), (44, 479273), (109, 193468), (218, 96734), (436, 48367), (1199, 17588), (2398, 8794), (4397, 4796)]