21356885

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4363}}^1$

素因数の和:4468

約数の個数: 16

約数和(自身を含む): 28278720

約数和(自身を除く): 6921835

約数列:

[1, 5, 11, 55, 89, 445, 979, 4363, 4895, 21815, 47993, 239965, 388307, 1941535, 4271377, 21356885]

約数ペア:

[(1, 21356885), (5, 4271377), (11, 1941535), (55, 388307), (89, 239965), (445, 47993), (979, 21815), (4363, 4895)]