21716981

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{7993}}^1$

素因数の和:8036

約数の個数: 16

約数和(自身を含む): 26859840

約数和(自身を除く): 5142859

約数列:

[1, 11, 13, 19, 143, 209, 247, 2717, 7993, 87923, 103909, 151867, 1142999, 1670537, 1974271, 21716981]

約数ペア:

[(1, 21716981), (11, 1974271), (13, 1670537), (19, 1142999), (143, 151867), (209, 103909), (247, 87923), (2717, 7993)]