21920912

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{105389}}^1$

素因数の和:105410

約数の個数: 20

約数和(自身を含む): 45739260

約数和(自身を除く): 23818348

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 105389, 210778, 421556, 843112, 1370057, 1686224, 2740114, 5480228, 10960456, 21920912]

約数ペア:

[(1, 21920912), (2, 10960456), (4, 5480228), (8, 2740114), (13, 1686224), (16, 1370057), (26, 843112), (52, 421556), (104, 210778), (208, 105389)]