21556078

素因数分解:

$2^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1\times {\mathrm{1321}}^1$

素因数の和:1563

約数の個数: 16

約数和(自身を含む): 33314400

約数和(自身を除く): 11758322

約数列:

[1, 2, 41, 82, 199, 398, 1321, 2642, 8159, 16318, 54161, 108322, 262879, 525758, 10778039, 21556078]

約数ペア:

[(1, 21556078), (2, 10778039), (41, 525758), (82, 262879), (199, 108322), (398, 54161), (1321, 16318), (2642, 8159)]