20512606780

素因数分解:

$2^2\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1264649}}^1$

素因数の和:1265469

約数の個数: 24

約数和(自身を含む): 43129623600

約数和(自身を除く): 22617016820

約数列:

[1, 2, 4, 5, 10, 20, 811, 1622, 3244, 4055, 8110, 16220, 1264649, 2529298, 5058596, 6323245, 12646490, 25292980, 1025630339, 2051260678, 4102521356, 5128151695, 10256303390, 20512606780]

約数ペア:

[(1, 20512606780), (2, 10256303390), (4, 5128151695), (5, 4102521356), (10, 2051260678), (20, 1025630339), (811, 25292980), (1622, 12646490), (3244, 6323245), (4055, 5058596), (8110, 2529298), (16220, 1264649)]