19901915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{7699}}^1$

素因数の和:7762

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 6709285

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 7699, 38495, 84689, 361853, 423445, 1809265, 3980383, 19901915]

約数ペア:

[(1, 19901915), (5, 3980383), (11, 1809265), (47, 423445), (55, 361853), (235, 84689), (517, 38495), (2585, 7699)]