20990164

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{3919}}^1$

素因数の和:4039

約数の個数: 24

約数和(自身を含む): 39952640

約数和(自身を除く): 18962476

約数列:

[1, 2, 4, 13, 26, 52, 103, 206, 412, 1339, 2678, 3919, 5356, 7838, 15676, 50947, 101894, 203788, 403657, 807314, 1614628, 5247541, 10495082, 20990164]

約数ペア:

[(1, 20990164), (2, 10495082), (4, 5247541), (13, 1614628), (26, 807314), (52, 403657), (103, 203788), (206, 101894), (412, 50947), (1339, 15676), (2678, 7838), (3919, 5356)]