51781401

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{20047}}^1$

素因数の和:20101

約数の個数: 24

約数和(自身を含む): 87569664

約数和(自身を除く): 35788263

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 20047, 60141, 140329, 180423, 420987, 821927, 1262961, 2465781, 5753489, 7397343, 17260467, 51781401]

約数ペア:

[(1, 51781401), (3, 17260467), (7, 7397343), (9, 5753489), (21, 2465781), (41, 1262961), (63, 821927), (123, 420987), (287, 180423), (369, 140329), (861, 60141), (2583, 20047)]