20806539

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{653}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 32229120

約数和(自身を除く): 11422581

約数列:

[1, 3, 13, 19, 39, 43, 57, 129, 247, 559, 653, 741, 817, 1677, 1959, 2451, 8489, 10621, 12407, 25467, 28079, 31863, 37221, 84237, 161291, 365027, 483873, 533501, 1095081, 1600503, 6935513, 20806539]

約数ペア:

[(1, 20806539), (3, 6935513), (13, 1600503), (19, 1095081), (39, 533501), (43, 483873), (57, 365027), (129, 161291), (247, 84237), (559, 37221), (653, 31863), (741, 28079), (817, 25467), (1677, 12407), (1959, 10621), (2451, 8489)]