21321531

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{2797}}^1$

素因数の和:2832

約数の個数: 36

約数和(自身を含む): 38701936

約数和(自身を除く): 17380405

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 121, 231, 363, 693, 847, 1089, 2541, 2797, 7623, 8391, 19579, 25173, 30767, 58737, 92301, 176211, 215369, 276903, 338437, 646107, 1015311, 1938321, 2369059, 3045933, 7107177, 21321531]

約数ペア:

[(1, 21321531), (3, 7107177), (7, 3045933), (9, 2369059), (11, 1938321), (21, 1015311), (33, 646107), (63, 338437), (77, 276903), (99, 215369), (121, 176211), (231, 92301), (363, 58737), (693, 30767), (847, 25173), (1089, 19579), (2541, 8391), (2797, 7623)]