21563361

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{431}}^1$

素因数の和:566

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 12651039

約数列:

[1, 3, 9, 17, 27, 51, 109, 153, 327, 431, 459, 981, 1293, 1853, 2943, 3879, 5559, 7327, 11637, 16677, 21981, 46979, 50031, 65943, 140937, 197829, 422811, 798643, 1268433, 2395929, 7187787, 21563361]

約数ペア:

[(1, 21563361), (3, 7187787), (9, 2395929), (17, 1268433), (27, 798643), (51, 422811), (109, 197829), (153, 140937), (327, 65943), (431, 50031), (459, 46979), (981, 21981), (1293, 16677), (1853, 11637), (2943, 7327), (3879, 5559)]