21480767

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{3623}}^1$

素因数の和:3659

約数の個数: 18

約数和(自身を含む): 27473544

約数和(自身を除く): 5992777

約数列:

[1, 7, 11, 49, 77, 121, 539, 847, 3623, 5929, 25361, 39853, 177527, 278971, 438383, 1952797, 3068681, 21480767]

約数ペア:

[(1, 21480767), (7, 3068681), (11, 1952797), (49, 438383), (77, 278971), (121, 177527), (539, 39853), (847, 25361), (3623, 5929)]