19809713

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 26222592

約数和(自身を除く): 6412879

約数列:

[1, 7, 11, 31, 43, 77, 193, 217, 301, 341, 473, 1333, 1351, 2123, 2387, 3311, 5983, 8299, 9331, 14663, 14861, 41881, 58093, 65813, 91289, 102641, 257269, 460691, 639023, 1800883, 2829959, 19809713]

約数ペア:

[(1, 19809713), (7, 2829959), (11, 1800883), (31, 639023), (43, 460691), (77, 257269), (193, 102641), (217, 91289), (301, 65813), (341, 58093), (473, 41881), (1333, 14861), (1351, 14663), (2123, 9331), (2387, 8299), (3311, 5983)]