19996400

素因数分解:

$2^4\times 5^2\times {\mathrm{49991}}^1$

素因数の和:50009

約数の個数: 30

約数和(自身を含む): 48042312

約数和(自身を除く): 28045912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 49991, 99982, 199964, 249955, 399928, 499910, 799856, 999820, 1249775, 1999640, 2499550, 3999280, 4999100, 9998200, 19996400]

約数ペア:

[(1, 19996400), (2, 9998200), (4, 4999100), (5, 3999280), (8, 2499550), (10, 1999640), (16, 1249775), (20, 999820), (25, 799856), (40, 499910), (50, 399928), (80, 249955), (100, 199964), (200, 99982), (400, 49991)]