20990493

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{743}}^1$

素因数の和:865

約数の個数: 24

約数和(自身を含む): 31492032

約数和(自身を除く): 10501539

約数列:

[1, 3, 9, 43, 73, 129, 219, 387, 657, 743, 2229, 3139, 6687, 9417, 28251, 31949, 54239, 95847, 162717, 287541, 488151, 2332277, 6996831, 20990493]

約数ペア:

[(1, 20990493), (3, 6996831), (9, 2332277), (43, 488151), (73, 287541), (129, 162717), (219, 95847), (387, 54239), (657, 31949), (743, 28251), (2229, 9417), (3139, 6687)]