19991690

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{18341}}^1$

素因数の和:18457

約数の個数: 16

約数和(自身を含む): 36317160

約数和(自身を除く): 16325470

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 18341, 36682, 91705, 183410, 1999169, 3998338, 9995845, 19991690]

約数ペア:

[(1, 19991690), (2, 9995845), (5, 3998338), (10, 1999169), (109, 183410), (218, 91705), (545, 36682), (1090, 18341)]