21264489

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2389}}^1$

素因数の和:2461

約数の個数: 24

約数和(自身を含む): 32809920

約数和(自身を除く): 11545431

約数列:

[1, 3, 9, 23, 43, 69, 129, 207, 387, 989, 2389, 2967, 7167, 8901, 21501, 54947, 102727, 164841, 308181, 494523, 924543, 2362721, 7088163, 21264489]

約数ペア:

[(1, 21264489), (3, 7088163), (9, 2362721), (23, 924543), (43, 494523), (69, 308181), (129, 164841), (207, 102727), (387, 54947), (989, 21501), (2389, 8901), (2967, 7167)]