21221165

素因数分解:

$5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{2341}}^1$

素因数の和:2397

約数の個数: 24

約数和(自身を含む): 30436632

約数和(自身を除く): 9215467

約数列:

[1, 5, 7, 35, 37, 49, 185, 245, 259, 1295, 1813, 2341, 9065, 11705, 16387, 81935, 86617, 114709, 433085, 573545, 606319, 3031595, 4244233, 21221165]

約数ペア:

[(1, 21221165), (5, 4244233), (7, 3031595), (35, 606319), (37, 573545), (49, 433085), (185, 114709), (245, 86617), (259, 81935), (1295, 16387), (1813, 11705), (2341, 9065)]