19998200

素因数分解:

$2^3\times 5^2\times {\mathrm{99991}}^1$

素因数の和:100007

約数の個数: 24

約数和(自身を含む): 46496280

約数和(自身を除く): 26498080

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 99991, 199982, 399964, 499955, 799928, 999910, 1999820, 2499775, 3999640, 4999550, 9999100, 19998200]

約数ペア:

[(1, 19998200), (2, 9999100), (4, 4999550), (5, 3999640), (8, 2499775), (10, 1999820), (20, 999910), (25, 799928), (40, 499955), (50, 399964), (100, 199982), (200, 99991)]