21131091

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:304

約数の個数: 32

約数和(自身を含む): 32394240

約数和(自身を除く): 11263149

約数列:

[1, 3, 9, 27, 71, 73, 151, 213, 219, 453, 639, 657, 1359, 1917, 1971, 4077, 5183, 10721, 11023, 15549, 32163, 33069, 46647, 96489, 99207, 139941, 289467, 297621, 782633, 2347899, 7043697, 21131091]

約数ペア:

[(1, 21131091), (3, 7043697), (9, 2347899), (27, 782633), (71, 297621), (73, 289467), (151, 139941), (213, 99207), (219, 96489), (453, 46647), (639, 33069), (657, 32163), (1359, 15549), (1917, 11023), (1971, 10721), (4077, 5183)]