19909071

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:142

約数の個数: 80

約数和(自身を含む): 38108224

約数和(自身を除く): 18199153

約数列:

[1, 3, 7, 9, 13, 21, 27, 37, 39, 63, 73, 81, 91, 111, 117, 189, 219, 259, 273, 333, 351, 481, 511, 567, 657, 777, 819, 949, 999, 1053, 1443, 1533, 1971, 2331, 2457, 2701, 2847, 2997, 3367, 4329, 4599, 5913, 6643, 6993, 7371, 8103, 8541, 10101, 12987, 13797, 18907, 19929, 20979, 24309, 25623, 30303, 35113, 38961, 41391, 56721, 59787, 72927, 76869, 90909, 105339, 170163, 179361, 218781, 245791, 272727, 316017, 510489, 538083, 737373, 948051, 1531467, 2212119, 2844153, 6636357, 19909071]

約数ペア:

[(1, 19909071), (3, 6636357), (7, 2844153), (9, 2212119), (13, 1531467), (21, 948051), (27, 737373), (37, 538083), (39, 510489), (63, 316017), (73, 272727), (81, 245791), (91, 218781), (111, 179361), (117, 170163), (189, 105339), (219, 90909), (259, 76869), (273, 72927), (333, 59787), (351, 56721), (481, 41391), (511, 38961), (567, 35113), (657, 30303), (777, 25623), (819, 24309), (949, 20979), (999, 19929), (1053, 18907), (1443, 13797), (1533, 12987), (1971, 10101), (2331, 8541), (2457, 8103), (2701, 7371), (2847, 6993), (2997, 6643), (3367, 5913), (4329, 4599)]