20508957

素因数分解:

$3^6\times 7^1\times {\mathrm{4019}}^1$

素因数の和:4044

約数の個数: 28

約数和(自身を含む): 35150880

約数和(自身を除く): 14641923

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 4019, 5103, 12057, 28133, 36171, 84399, 108513, 253197, 325539, 759591, 976617, 2278773, 2929851, 6836319, 20508957]

約数ペア:

[(1, 20508957), (3, 6836319), (7, 2929851), (9, 2278773), (21, 976617), (27, 759591), (63, 325539), (81, 253197), (189, 108513), (243, 84399), (567, 36171), (729, 28133), (1701, 12057), (4019, 5103)]