21052265

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{1987}}^1$

素因数の和:2168

約数の個数: 16

約数和(自身を含む): 27386688

約数和(自身を除く): 6334423

約数列:

[1, 5, 13, 65, 163, 815, 1987, 2119, 9935, 10595, 25831, 129155, 323881, 1619405, 4210453, 21052265]

約数ペア:

[(1, 21052265), (5, 4210453), (13, 1619405), (65, 323881), (163, 129155), (815, 25831), (1987, 10595), (2119, 9935)]