18538640

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2389}}^1$

素因数の和:2499

約数の個数: 40

約数和(自身を含む): 43564920

約数和(自身を除く): 25026280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2389, 3880, 4778, 7760, 9556, 11945, 19112, 23890, 38224, 47780, 95560, 191120, 231733, 463466, 926932, 1158665, 1853864, 2317330, 3707728, 4634660, 9269320, 18538640]

約数ペア:

[(1, 18538640), (2, 9269320), (4, 4634660), (5, 3707728), (8, 2317330), (10, 1853864), (16, 1158665), (20, 926932), (40, 463466), (80, 231733), (97, 191120), (194, 95560), (388, 47780), (485, 38224), (776, 23890), (970, 19112), (1552, 11945), (1940, 9556), (2389, 7760), (3880, 4778)]