19685997

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5171}}^1$

素因数の和:5230

約数の個数: 20

約数和(自身を含む): 30038976

約数和(自身を除く): 10352979

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5171, 15513, 46539, 139617, 243037, 418851, 729111, 2187333, 6561999, 19685997]

約数ペア:

[(1, 19685997), (3, 6561999), (9, 2187333), (27, 729111), (47, 418851), (81, 243037), (141, 139617), (423, 46539), (1269, 15513), (3807, 5171)]