21208161

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28621}}^1$

素因数の和:28656

約数の個数: 16

約数和(自身を含む): 32056640

約数和(自身を除く): 10848479

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28621, 85863, 372073, 543799, 1116219, 1631397, 7069387, 21208161]

約数ペア:

[(1, 21208161), (3, 7069387), (13, 1631397), (19, 1116219), (39, 543799), (57, 372073), (247, 85863), (741, 28621)]