21781221

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{94291}}^1$

素因数の和:94312

約数の個数: 16

約数和(自身を含む): 36208128

約数和(自身を除く): 14426907

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 94291, 282873, 660037, 1037201, 1980111, 3111603, 7260407, 21781221]

約数ペア:

[(1, 21781221), (3, 7260407), (7, 3111603), (11, 1980111), (21, 1037201), (33, 660037), (77, 282873), (231, 94291)]