21761439

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{4001}}^1$

素因数の和:4055

約数の個数: 24

約数和(自身を含む): 34673328

約数和(自身を除く): 12911889

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 4001, 5439, 12003, 28007, 84021, 148037, 196049, 444111, 588147, 1036259, 3108777, 7253813, 21761439]

約数ペア:

[(1, 21761439), (3, 7253813), (7, 3108777), (21, 1036259), (37, 588147), (49, 444111), (111, 196049), (147, 148037), (259, 84021), (777, 28007), (1813, 12003), (4001, 5439)]