19915021

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{21391}}^1$

素因数の和:21424

約数の個数: 12

約数和(自身を含む): 24386880

約数和(自身を除く): 4471859

約数列:

[1, 7, 19, 49, 133, 931, 21391, 149737, 406429, 1048159, 2845003, 19915021]

約数ペア:

[(1, 19915021), (7, 2845003), (19, 1048159), (49, 406429), (133, 149737), (931, 21391)]