21081203

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{7759}}^1$

素因数の和:7802

約数の個数: 16

約数和(自身を含む): 26073600

約数和(自身を除く): 4992397

約数列:

[1, 11, 13, 19, 143, 209, 247, 2717, 7759, 85349, 100867, 147421, 1109537, 1621631, 1916473, 21081203]

約数ペア:

[(1, 21081203), (11, 1916473), (13, 1621631), (19, 1109537), (143, 147421), (209, 100867), (247, 85349), (2717, 7759)]