20811895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{13921}}^1$

素因数の和:13962

約数の個数: 16

約数和(自身を含む): 28066752

約数和(自身を除く): 7254857

約数列:

[1, 5, 13, 23, 65, 115, 299, 1495, 13921, 69605, 180973, 320183, 904865, 1600915, 4162379, 20811895]

約数ペア:

[(1, 20811895), (5, 4162379), (13, 1600915), (23, 904865), (65, 320183), (115, 180973), (299, 69605), (1495, 13921)]