21288421

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{3331}}^1$

素因数の和:3432

約数の個数: 16

約数和(自身を含む): 26869248

約数和(自身を除く): 5580827

約数列:

[1, 7, 11, 77, 83, 581, 913, 3331, 6391, 23317, 36641, 256487, 276473, 1935311, 3041203, 21288421]

約数ペア:

[(1, 21288421), (7, 3041203), (11, 1935311), (77, 276473), (83, 256487), (581, 36641), (913, 23317), (3331, 6391)]