21004353

素因数分解:

$3^4\times {\mathrm{257}}^1\times {\mathrm{1009}}^1$

素因数の和:1278

約数の個数: 20

約数和(自身を含む): 31530180

約数和(自身を除く): 10525827

約数列:

[1, 3, 9, 27, 81, 257, 771, 1009, 2313, 3027, 6939, 9081, 20817, 27243, 81729, 259313, 777939, 2333817, 7001451, 21004353]

約数ペア:

[(1, 21004353), (3, 7001451), (9, 2333817), (27, 777939), (81, 259313), (257, 81729), (771, 27243), (1009, 20817), (2313, 9081), (3027, 6939)]