19990180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{142787}}^1$

素因数の和:142803

約数の個数: 24

約数和(自身を含む): 47976768

約数和(自身を除く): 27986588

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 142787, 285574, 571148, 713935, 999509, 1427870, 1999018, 2855740, 3998036, 4997545, 9995090, 19990180]

約数ペア:

[(1, 19990180), (2, 9995090), (4, 4997545), (5, 3998036), (7, 2855740), (10, 1999018), (14, 1427870), (20, 999509), (28, 713935), (35, 571148), (70, 285574), (140, 142787)]