20987211

素因数分解:

$3^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{10303}}^1$

素因数の和:10410

約数の個数: 16

約数和(自身を含む): 32313344

約数和(自身を除く): 11326133

約数列:

[1, 3, 7, 21, 97, 291, 679, 2037, 10303, 30909, 72121, 216363, 999391, 2998173, 6995737, 20987211]

約数ペア:

[(1, 20987211), (3, 6995737), (7, 2998173), (21, 999391), (97, 216363), (291, 72121), (679, 30909), (2037, 10303)]