20557173

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{293}}^1$

素因数の和:573

約数の個数: 32

約数和(自身を含む): 33981696

約数和(自身を除く): 13424523

約数列:

[1, 3, 7, 13, 21, 39, 91, 257, 273, 293, 771, 879, 1799, 2051, 3341, 3809, 5397, 6153, 10023, 11427, 23387, 26663, 70161, 75301, 79989, 225903, 527107, 978913, 1581321, 2936739, 6852391, 20557173]

約数ペア:

[(1, 20557173), (3, 6852391), (7, 2936739), (13, 1581321), (21, 978913), (39, 527107), (91, 225903), (257, 79989), (273, 75301), (293, 70161), (771, 26663), (879, 23387), (1799, 11427), (2051, 10023), (3341, 6153), (3809, 5397)]