199380260

素因数分解:

$2^2\times 5^1\times {\mathrm{1999}}^1\times {\mathrm{4987}}^1$

素因数の和:6995

約数の個数: 24

約数和(自身を含む): 418992000

約数和(自身を除く): 219611740

約数列:

[1, 2, 4, 5, 10, 20, 1999, 3998, 4987, 7996, 9974, 9995, 19948, 19990, 24935, 39980, 49870, 99740, 9969013, 19938026, 39876052, 49845065, 99690130, 199380260]

約数ペア:

[(1, 199380260), (2, 99690130), (4, 49845065), (5, 39876052), (10, 19938026), (20, 9969013), (1999, 99740), (3998, 49870), (4987, 39980), (7996, 24935), (9974, 19990), (9995, 19948)]