389804961

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{4651}}^1$

素因数の和:4981

約数の個数: 32

約数和(自身を含む): 641901568

約数和(自身を除く): 252096607

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 307, 921, 2149, 3991, 4651, 6447, 11973, 13953, 27937, 32557, 60463, 83811, 97671, 181389, 423241, 1269723, 1427857, 4283571, 9994999, 18562141, 29984997, 55686423, 129934987, 389804961]

約数ペア:

[(1, 389804961), (3, 129934987), (7, 55686423), (13, 29984997), (21, 18562141), (39, 9994999), (91, 4283571), (273, 1427857), (307, 1269723), (921, 423241), (2149, 181389), (3991, 97671), (4651, 83811), (6447, 60463), (11973, 32557), (13953, 27937)]