21420674

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{2503}}^1$

素因数の和:2905

約数の個数: 16

約数和(自身を含む): 35156160

約数和(自身を除く): 13735486

約数列:

[1, 2, 11, 22, 389, 778, 2503, 4279, 5006, 8558, 27533, 55066, 973667, 1947334, 10710337, 21420674]

約数ペア:

[(1, 21420674), (2, 10710337), (11, 1947334), (22, 973667), (389, 55066), (778, 27533), (2503, 8558), (4279, 5006)]