21006156951

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19948867}}^1$

素因数の和:19948892

約数の個数: 20

約数和(自身を含む): 33793382392

約数和(自身を除く): 12787225441

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 19948867, 59846601, 179539803, 259335271, 538619409, 778005813, 1615858227, 2334017439, 7002052317, 21006156951]

約数ペア:

[(1, 21006156951), (3, 7002052317), (9, 2334017439), (13, 1615858227), (27, 778005813), (39, 538619409), (81, 259335271), (117, 179539803), (351, 59846601), (1053, 19948867)]