21153027

素因数分解:

$3^1\times 7^1\times {\mathrm{977}}^1\times {\mathrm{1031}}^1$

素因数の和:2018

約数の個数: 16

約数和(自身を含む): 32297472

約数和(自身を除く): 11144445

約数列:

[1, 3, 7, 21, 977, 1031, 2931, 3093, 6839, 7217, 20517, 21651, 1007287, 3021861, 7051009, 21153027]

約数ペア:

[(1, 21153027), (3, 7051009), (7, 3021861), (21, 1007287), (977, 21651), (1031, 20517), (2931, 7217), (3093, 6839)]