21052551

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28411}}^1$

素因数の和:28446

約数の個数: 16

約数和(自身を含む): 31821440

約数和(自身を除く): 10768889

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28411, 85233, 369343, 539809, 1108029, 1619427, 7017517, 21052551]

約数ペア:

[(1, 21052551), (3, 7017517), (13, 1619427), (19, 1108029), (39, 539809), (57, 369343), (247, 85233), (741, 28411)]