21293391

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3533}}^1$

素因数の和:3591

約数の個数: 24

約数和(自身を含む): 33841584

約数和(自身を除く): 12548193

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3533, 6027, 10599, 24731, 74193, 144853, 173117, 434559, 519351, 1013971, 3041913, 7097797, 21293391]

約数ペア:

[(1, 21293391), (3, 7097797), (7, 3041913), (21, 1013971), (41, 519351), (49, 434559), (123, 173117), (147, 144853), (287, 74193), (861, 24731), (2009, 10599), (3533, 6027)]