198098980

素因数分解:

$2^2\times 5^1\times {\mathrm{9904949}}^1$

素因数の和:9904958

約数の個数: 12

約数和(自身を含む): 416007900

約数和(自身を除く): 217908920

約数列:

[1, 2, 4, 5, 10, 20, 9904949, 19809898, 39619796, 49524745, 99049490, 198098980]

約数ペア:

[(1, 198098980), (2, 99049490), (4, 49524745), (5, 39619796), (10, 19809898), (20, 9904949)]