19648780

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{4987}}^1$

素因数の和:5193

約数の個数: 24

約数和(自身を含む): 41480208

約数和(自身を除く): 21831428

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 4987, 9974, 19948, 24935, 49870, 99740, 982439, 1964878, 3929756, 4912195, 9824390, 19648780]

約数ペア:

[(1, 19648780), (2, 9824390), (4, 4912195), (5, 3929756), (10, 1964878), (20, 982439), (197, 99740), (394, 49870), (788, 24935), (985, 19948), (1970, 9974), (3940, 4987)]