21164319

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{3011}}^1$

素因数の和:3099

約数の個数: 24

約数和(自身を含む): 33830784

約数和(自身を除く): 12666465

約数列:

[1, 3, 9, 11, 33, 71, 99, 213, 639, 781, 2343, 3011, 7029, 9033, 27099, 33121, 99363, 213781, 298089, 641343, 1924029, 2351591, 7054773, 21164319]

約数ペア:

[(1, 21164319), (3, 7054773), (9, 2351591), (11, 1924029), (33, 641343), (71, 298089), (99, 213781), (213, 99363), (639, 33121), (781, 27099), (2343, 9033), (3011, 7029)]