21840261378

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{280003351}}^1$

素因数の和:280003369

約数の個数: 16

約数和(自身を含む): 47040563136

約数和(自身を除く): 25200301758

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 280003351, 560006702, 840010053, 1680020106, 3640043563, 7280087126, 10920130689, 21840261378]

約数ペア:

[(1, 21840261378), (2, 10920130689), (3, 7280087126), (6, 3640043563), (13, 1680020106), (26, 840010053), (39, 560006702), (78, 280003351)]