19903961

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{3541}}^1$

素因数の和:3632

約数の個数: 16

約数和(自身を含む): 25162368

約数和(自身を除く): 5258407

約数列:

[1, 7, 11, 73, 77, 511, 803, 3541, 5621, 24787, 38951, 258493, 272657, 1809451, 2843423, 19903961]

約数ペア:

[(1, 19903961), (7, 2843423), (11, 1809451), (73, 272657), (77, 258493), (511, 38951), (803, 24787), (3541, 5621)]