21925897

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{1279}}^1$

素因数の和:1396

約数の個数: 16

約数和(自身を含む): 26214400

約数和(自身を除く): 4288503

約数列:

[1, 7, 31, 79, 217, 553, 1279, 2449, 8953, 17143, 39649, 101041, 277543, 707287, 3132271, 21925897]

約数ペア:

[(1, 21925897), (7, 3132271), (31, 707287), (79, 277543), (217, 101041), (553, 39649), (1279, 17143), (2449, 8953)]