21728133

素因数分解:

$3^2\times 7^1\times {\mathrm{193}}^1\times {\mathrm{1787}}^1$

素因数の和:1993

約数の個数: 24

約数和(自身を含む): 36074688

約数和(自身を除く): 14346555

約数列:

[1, 3, 7, 9, 21, 63, 193, 579, 1351, 1737, 1787, 4053, 5361, 12159, 12509, 16083, 37527, 112581, 344891, 1034673, 2414237, 3104019, 7242711, 21728133]

約数ペア:

[(1, 21728133), (3, 7242711), (7, 3104019), (9, 2414237), (21, 1034673), (63, 344891), (193, 112581), (579, 37527), (1351, 16083), (1737, 12509), (1787, 12159), (4053, 5361)]