21387443

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{7507}}^1$

素因数の和:7562

約数の個数: 16

約数和(自身を含む): 27389184

約数和(自身を除く): 6001741

約数列:

[1, 7, 11, 37, 77, 259, 407, 2849, 7507, 52549, 82577, 277759, 578039, 1944313, 3055349, 21387443]

約数ペア:

[(1, 21387443), (7, 3055349), (11, 1944313), (37, 578039), (77, 277759), (259, 82577), (407, 52549), (2849, 7507)]