21187991

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{1009}}^1$

素因数の和:1126

約数の個数: 16

約数和(自身を含む): 24433920

約数和(自身を除く): 3245929

約数列:

[1, 11, 23, 83, 253, 913, 1009, 1909, 11099, 20999, 23207, 83747, 255277, 921217, 1926181, 21187991]

約数ペア:

[(1, 21187991), (11, 1926181), (23, 921217), (83, 255277), (253, 83747), (913, 23207), (1009, 20999), (1909, 11099)]