18365991

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 29127168

約数和(自身を除く): 10761177

約数列:

[1, 3, 7, 21, 41, 83, 123, 249, 257, 287, 581, 771, 861, 1743, 1799, 3403, 5397, 10209, 10537, 21331, 23821, 31611, 63993, 71463, 73759, 149317, 221277, 447951, 874571, 2623713, 6121997, 18365991]

約数ペア:

[(1, 18365991), (3, 6121997), (7, 2623713), (21, 874571), (41, 447951), (83, 221277), (123, 149317), (249, 73759), (257, 71463), (287, 63993), (581, 31611), (771, 23821), (861, 21331), (1743, 10537), (1799, 10209), (3403, 5397)]