19915780

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21187}}^1$

素因数の和:21243

約数の個数: 24

約数和(自身を含む): 42715008

約数和(自身を除く): 22799228

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21187, 42374, 84748, 105935, 211870, 423740, 995789, 1991578, 3983156, 4978945, 9957890, 19915780]

約数ペア:

[(1, 19915780), (2, 9957890), (4, 4978945), (5, 3983156), (10, 1991578), (20, 995789), (47, 423740), (94, 211870), (188, 105935), (235, 84748), (470, 42374), (940, 21187)]