199956980

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{72977}}^1$

素因数の和:73123

約数の個数: 24

約数和(自身を含む): 422980488

約数和(自身を除く): 223023508

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 72977, 145954, 291908, 364885, 729770, 1459540, 9997849, 19995698, 39991396, 49989245, 99978490, 199956980]

約数ペア:

[(1, 199956980), (2, 99978490), (4, 49989245), (5, 39991396), (10, 19995698), (20, 9997849), (137, 1459540), (274, 729770), (548, 364885), (685, 291908), (1370, 145954), (2740, 72977)]