21168539

素因数分解:

$7^2\times {\mathrm{151}}^1\times {\mathrm{2861}}^1$

素因数の和:3026

約数の個数: 12

約数和(自身を含む): 24796368

約数和(自身を除く): 3627829

約数列:

[1, 7, 49, 151, 1057, 2861, 7399, 20027, 140189, 432011, 3024077, 21168539]

約数ペア:

[(1, 21168539), (7, 3024077), (49, 432011), (151, 140189), (1057, 20027), (2861, 7399)]