18747813

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2473}}^1$

素因数の和:2521

約数の個数: 24

約数和(自身を含む): 30163008

約数和(自身を除く): 11415195

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2473, 2527, 7419, 7581, 17311, 46987, 51933, 140961, 328909, 892753, 986727, 2678259, 6249271, 18747813]

約数ペア:

[(1, 18747813), (3, 6249271), (7, 2678259), (19, 986727), (21, 892753), (57, 328909), (133, 140961), (361, 51933), (399, 46987), (1083, 17311), (2473, 7581), (2527, 7419)]