20911401

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{8971}}^1$

素因数の和:9021

約数の個数: 24

約数和(自身を含む): 35457344

約数和(自身を除く): 14545943

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 8971, 26913, 62797, 80739, 188391, 331927, 565173, 995781, 2323489, 2987343, 6970467, 20911401]

約数ペア:

[(1, 20911401), (3, 6970467), (7, 2987343), (9, 2323489), (21, 995781), (37, 565173), (63, 331927), (111, 188391), (259, 80739), (333, 62797), (777, 26913), (2331, 8971)]