20217405

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{521}}^1$

素因数の和:741

約数の個数: 32

約数和(自身を含む): 35078400

約数和(自身を除く): 14860995

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 199, 521, 597, 995, 1563, 2587, 2605, 2985, 6773, 7761, 7815, 12935, 20319, 33865, 38805, 101595, 103679, 311037, 518395, 1347827, 1555185, 4043481, 6739135, 20217405]

約数ペア:

[(1, 20217405), (3, 6739135), (5, 4043481), (13, 1555185), (15, 1347827), (39, 518395), (65, 311037), (195, 103679), (199, 101595), (521, 38805), (597, 33865), (995, 20319), (1563, 12935), (2587, 7815), (2605, 7761), (2985, 6773)]