20211457

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2671}}^1$

素因数の和:2748

約数の個数: 16

約数和(自身を含む): 24625152

約数和(自身を除く): 4413695

約数列:

[1, 7, 23, 47, 161, 329, 1081, 2671, 7567, 18697, 61433, 125537, 430031, 878759, 2887351, 20211457]

約数ペア:

[(1, 20211457), (7, 2887351), (23, 878759), (47, 430031), (161, 125537), (329, 61433), (1081, 18697), (2671, 7567)]