21731944

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208961}}^1$

素因数の和:208980

約数の個数: 16

約数和(自身を含む): 43882020

約数和(自身を除く): 22150076

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208961, 417922, 835844, 1671688, 2716493, 5432986, 10865972, 21731944]

約数ペア:

[(1, 21731944), (2, 10865972), (4, 5432986), (8, 2716493), (13, 1671688), (26, 835844), (52, 417922), (104, 208961)]