1981655

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{709}}^1$

素因数の和:770

約数の個数: 16

約数和(自身を含む): 2624160

約数和(自身を除く): 642505

約数列:

[1, 5, 13, 43, 65, 215, 559, 709, 2795, 3545, 9217, 30487, 46085, 152435, 396331, 1981655]

約数ペア:

[(1, 1981655), (5, 396331), (13, 152435), (43, 46085), (65, 30487), (215, 9217), (559, 3545), (709, 2795)]