18965891

素因数分解:

$7^2\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:243

約数の個数: 24

約数和(自身を含む): 23023440

約数和(自身を除く): 4057549

約数列:

[1, 7, 49, 53, 67, 109, 371, 469, 763, 2597, 3283, 3551, 5341, 5777, 7303, 24857, 40439, 51121, 173999, 283073, 357847, 387059, 2709413, 18965891]

約数ペア:

[(1, 18965891), (7, 2709413), (49, 387059), (53, 357847), (67, 283073), (109, 173999), (371, 51121), (469, 40439), (763, 24857), (2597, 7303), (3283, 5777), (3551, 5341)]