20517381

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8171}}^1$

素因数の和:8214

約数の個数: 20

約数和(自身を含む): 31641984

約数和(自身を除く): 11124603

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8171, 24513, 73539, 220617, 253301, 661851, 759903, 2279709, 6839127, 20517381]

約数ペア:

[(1, 20517381), (3, 6839127), (9, 2279709), (27, 759903), (31, 661851), (81, 253301), (93, 220617), (279, 73539), (837, 24513), (2511, 8171)]