21339292

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31567}}^1$

素因数の和:31597

約数の個数: 18

約数和(自身を含む): 40438608

約数和(自身を除く): 19099316

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31567, 63134, 126268, 410371, 820742, 1641484, 5334823, 10669646, 21339292]

約数ペア:

[(1, 21339292), (2, 10669646), (4, 5334823), (13, 1641484), (26, 820742), (52, 410371), (169, 126268), (338, 63134), (676, 31567)]