20731821

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{647}}^1\times {\mathrm{971}}^1$

素因数の和:1632

約数の個数: 16

約数和(自身を含む): 30233088

約数和(自身を除く): 9501267

約数列:

[1, 3, 11, 33, 647, 971, 1941, 2913, 7117, 10681, 21351, 32043, 628237, 1884711, 6910607, 20731821]

約数ペア:

[(1, 20731821), (3, 6910607), (11, 1884711), (33, 628237), (647, 32043), (971, 21351), (1941, 10681), (2913, 7117)]