19874561

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{193}}^1\times {\mathrm{313}}^1$

素因数の和:560

約数の個数: 16

約数和(自身を含む): 23391744

約数和(自身を除く): 3517183

約数列:

[1, 7, 47, 193, 313, 329, 1351, 2191, 9071, 14711, 60409, 63497, 102977, 422863, 2839223, 19874561]

約数ペア:

[(1, 19874561), (7, 2839223), (47, 422863), (193, 102977), (313, 63497), (329, 60409), (1351, 14711), (2191, 9071)]