198071780

素因数分解:

$2^2\times 5^1\times {\mathrm{9903589}}^1$

素因数の和:9903598

約数の個数: 12

約数和(自身を含む): 415950780

約数和(自身を除く): 217879000

約数列:

[1, 2, 4, 5, 10, 20, 9903589, 19807178, 39614356, 49517945, 99035890, 198071780]

約数ペア:

[(1, 198071780), (2, 99035890), (4, 49517945), (5, 39614356), (10, 19807178), (20, 9903589)]