19958990

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{18311}}^1$

素因数の和:18427

約数の個数: 16

約数和(自身を含む): 36257760

約数和(自身を除く): 16298770

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 18311, 36622, 91555, 183110, 1995899, 3991798, 9979495, 19958990]

約数ペア:

[(1, 19958990), (2, 9979495), (5, 3991798), (10, 1995899), (109, 183110), (218, 91555), (545, 36622), (1090, 18311)]