21572271

素因数分解:

$3^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{727}}^1$

素因数の和:900

約数の個数: 32

約数和(自身を含む): 36807680

約数和(自身を除く): 15235409

約数列:

[1, 3, 7, 9, 21, 27, 63, 157, 189, 471, 727, 1099, 1413, 2181, 3297, 4239, 5089, 6543, 9891, 15267, 19629, 29673, 45801, 114139, 137403, 342417, 798973, 1027251, 2396919, 3081753, 7190757, 21572271]

約数ペア:

[(1, 21572271), (3, 7190757), (7, 3081753), (9, 2396919), (21, 1027251), (27, 798973), (63, 342417), (157, 137403), (189, 114139), (471, 45801), (727, 29673), (1099, 19629), (1413, 15267), (2181, 9891), (3297, 6543), (4239, 5089)]