21860421

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1$

素因数の和:313

約数の個数: 32

約数和(自身を含む): 33094656

約数和(自身を除く): 11234235

約数列:

[1, 3, 11, 33, 41, 107, 123, 151, 321, 451, 453, 1177, 1353, 1661, 3531, 4387, 4983, 6191, 13161, 16157, 18573, 48257, 48471, 68101, 144771, 177727, 204303, 533181, 662437, 1987311, 7286807, 21860421]

約数ペア:

[(1, 21860421), (3, 7286807), (11, 1987311), (33, 662437), (41, 533181), (107, 204303), (123, 177727), (151, 144771), (321, 68101), (451, 48471), (453, 48257), (1177, 18573), (1353, 16157), (1661, 13161), (3531, 6191), (4387, 4983)]