19993780

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7297}}^1$

素因数の和:7443

約数の個数: 24

約数和(自身を含む): 42299208

約数和(自身を除く): 22305428

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7297, 14594, 29188, 36485, 72970, 145940, 999689, 1999378, 3998756, 4998445, 9996890, 19993780]

約数ペア:

[(1, 19993780), (2, 9996890), (4, 4998445), (5, 3998756), (10, 1999378), (20, 999689), (137, 145940), (274, 72970), (548, 36485), (685, 29188), (1370, 14594), (2740, 7297)]