20781668

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{2819}}^1$

素因数の和:2939

約数の個数: 24

約数和(自身を含む): 38690400

約数和(自身を除く): 17908732

約数列:

[1, 2, 4, 19, 38, 76, 97, 194, 388, 1843, 2819, 3686, 5638, 7372, 11276, 53561, 107122, 214244, 273443, 546886, 1093772, 5195417, 10390834, 20781668]

約数ペア:

[(1, 20781668), (2, 10390834), (4, 5195417), (19, 1093772), (38, 546886), (76, 273443), (97, 214244), (194, 107122), (388, 53561), (1843, 11276), (2819, 7372), (3686, 5638)]