20991010

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{110479}}^1$

素因数の和:110505

約数の個数: 16

約数和(自身を含む): 39772800

約数和(自身を除く): 18781790

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 110479, 220958, 552395, 1104790, 2099101, 4198202, 10495505, 20991010]

約数ペア:

[(1, 20991010), (2, 10495505), (5, 4198202), (10, 2099101), (19, 1104790), (38, 552395), (95, 220958), (190, 110479)]