20920641

素因数分解:

$3^1\times 7^1\times {\mathrm{461}}^1\times {\mathrm{2161}}^1$

素因数の和:2632

約数の個数: 16

約数和(自身を含む): 31963008

約数和(自身を除く): 11042367

約数列:

[1, 3, 7, 21, 461, 1383, 2161, 3227, 6483, 9681, 15127, 45381, 996221, 2988663, 6973547, 20920641]

約数ペア:

[(1, 20920641), (3, 6973547), (7, 2988663), (21, 996221), (461, 45381), (1383, 15127), (2161, 9681), (3227, 6483)]