1281391569

素因数分解:

$3^4\times {\mathrm{239}}^1\times {\mathrm{66191}}^1$

素因数の和:66442

約数の個数: 20

約数和(自身を含む): 1922215680

約数和(自身を除く): 640824111

約数列:

[1, 3, 9, 27, 81, 239, 717, 2151, 6453, 19359, 66191, 198573, 595719, 1787157, 5361471, 15819649, 47458947, 142376841, 427130523, 1281391569]

約数ペア:

[(1, 1281391569), (3, 427130523), (9, 142376841), (27, 47458947), (81, 15819649), (239, 5361471), (717, 1787157), (2151, 595719), (6453, 198573), (19359, 66191)]