21764187

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{347}}^1$

素因数の和:480

約数の個数: 32

約数和(自身を含む): 34076160

約数和(自身を除く): 12311973

約数列:

[1, 3, 9, 23, 27, 69, 101, 207, 303, 347, 621, 909, 1041, 2323, 2727, 3123, 6969, 7981, 9369, 20907, 23943, 35047, 62721, 71829, 105141, 215487, 315423, 806081, 946269, 2418243, 7254729, 21764187]

約数ペア:

[(1, 21764187), (3, 7254729), (9, 2418243), (23, 946269), (27, 806081), (69, 315423), (101, 215487), (207, 105141), (303, 71829), (347, 62721), (621, 35047), (909, 23943), (1041, 20907), (2323, 9369), (2727, 7981), (3123, 6969)]