261661617

素因数分解:

$3^3\times 7^2\times {\mathrm{197779}}^1$

素因数の和:197802

約数の個数: 24

約数和(自身を含む): 450938400

約数和(自身を除く): 189276783

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 197779, 593337, 1384453, 1780011, 4153359, 5340033, 9691171, 12460077, 29073513, 37380231, 87220539, 261661617]

約数ペア:

[(1, 261661617), (3, 87220539), (7, 37380231), (9, 29073513), (21, 12460077), (27, 9691171), (49, 5340033), (63, 4153359), (147, 1780011), (189, 1384453), (441, 593337), (1323, 197779)]