21821471

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{547}}^1$

素因数の和:734

約数の個数: 16

約数和(自身を含む): 25777920

約数和(自身を除く): 3956449

約数列:

[1, 7, 41, 139, 287, 547, 973, 3829, 5699, 22427, 39893, 76033, 156989, 532231, 3117353, 21821471]

約数ペア:

[(1, 21821471), (7, 3117353), (41, 532231), (139, 156989), (287, 76033), (547, 39893), (973, 22427), (3829, 5699)]