21209793

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{14947}}^1$

素因数の和:15004

約数の個数: 16

約数和(自身を含む): 31570176

約数和(自身を除く): 10360383

約数列:

[1, 3, 11, 33, 43, 129, 473, 1419, 14947, 44841, 164417, 493251, 642721, 1928163, 7069931, 21209793]

約数ペア:

[(1, 21209793), (3, 7069931), (11, 1928163), (33, 642721), (43, 493251), (129, 164417), (473, 44841), (1419, 14947)]