21183219

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{431}}^1$

素因数の和:607

約数の個数: 24

約数和(自身を含む): 31629312

約数和(自身を除く): 10446093

約数列:

[1, 3, 9, 43, 127, 129, 381, 387, 431, 1143, 1293, 3879, 5461, 16383, 18533, 49149, 54737, 55599, 164211, 166797, 492633, 2353691, 7061073, 21183219]

約数ペア:

[(1, 21183219), (3, 7061073), (9, 2353691), (43, 492633), (127, 166797), (129, 164211), (381, 55599), (387, 54737), (431, 49149), (1143, 18533), (1293, 16383), (3879, 5461)]