21381085

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{3061}}^1$

素因数の和:3204

約数の個数: 16

約数和(自身を含む): 28219392

約数和(自身を除く): 6838307

約数列:

[1, 5, 11, 55, 127, 635, 1397, 3061, 6985, 15305, 33671, 168355, 388747, 1943735, 4276217, 21381085]

約数ペア:

[(1, 21381085), (5, 4276217), (11, 1943735), (55, 388747), (127, 168355), (635, 33671), (1397, 15305), (3061, 6985)]