21340209

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{13759}}^1$

素因数の和:13820

約数の個数: 16

約数和(自身を含む): 31703040

約数和(自身を除く): 10362831

約数列:

[1, 3, 11, 33, 47, 141, 517, 1551, 13759, 41277, 151349, 454047, 646673, 1940019, 7113403, 21340209]

約数ペア:

[(1, 21340209), (3, 7113403), (11, 1940019), (33, 646673), (47, 454047), (141, 151349), (517, 41277), (1551, 13759)]