19911883971

素因数分解:

$3^1\times 7^2\times {\mathrm{401}}^1\times {\mathrm{337793}}^1$

素因数の和:338211

約数の個数: 24

約数和(自身を含む): 30960846864

約数和(自身を除く): 11048962893

約数列:

[1, 3, 7, 21, 49, 147, 401, 1203, 2807, 8421, 19649, 58947, 337793, 1013379, 2364551, 7093653, 16551857, 49655571, 135454993, 406364979, 948184951, 2844554853, 6637294657, 19911883971]

約数ペア:

[(1, 19911883971), (3, 6637294657), (7, 2844554853), (21, 948184951), (49, 406364979), (147, 135454993), (401, 49655571), (1203, 16551857), (2807, 7093653), (8421, 2364551), (19649, 1013379), (58947, 337793)]