18977903

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{293}}^1\times {\mathrm{487}}^1$

素因数の和:806

約数の個数: 16

約数和(自身を含む): 22955520

約数和(自身を除く): 3977617

約数列:

[1, 7, 19, 133, 293, 487, 2051, 3409, 5567, 9253, 38969, 64771, 142691, 998837, 2711129, 18977903]

約数ペア:

[(1, 18977903), (7, 2711129), (19, 998837), (133, 142691), (293, 64771), (487, 38969), (2051, 9253), (3409, 5567)]