19901693

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{17659}}^1$

素因数の和:17696

約数の個数: 12

約数和(自身を含む): 24158880

約数和(自身を除く): 4257187

約数列:

[1, 7, 23, 49, 161, 1127, 17659, 123613, 406157, 865291, 2843099, 19901693]

約数ペア:

[(1, 19901693), (7, 2843099), (23, 865291), (49, 406157), (161, 123613), (1127, 17659)]