198804940

素因数分解:

$2^2\times 5^1\times {\mathrm{9940247}}^1$

素因数の和:9940256

約数の個数: 12

約数和(自身を含む): 417490416

約数和(自身を除く): 218685476

約数列:

[1, 2, 4, 5, 10, 20, 9940247, 19880494, 39760988, 49701235, 99402470, 198804940]

約数ペア:

[(1, 198804940), (2, 99402470), (4, 49701235), (5, 39760988), (10, 19880494), (20, 9940247)]