19665821

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{2801}}^1$

素因数の和:2884

約数の個数: 16

約数和(自身を含む): 24209280

約数和(自身を除く): 4543459

約数列:

[1, 7, 17, 59, 119, 413, 1003, 2801, 7021, 19607, 47617, 165259, 333319, 1156813, 2809403, 19665821]

約数ペア:

[(1, 19665821), (7, 2809403), (17, 1156813), (59, 333319), (119, 165259), (413, 47617), (1003, 19607), (2801, 7021)]