21609707

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{3457}}^1$

素因数の和:3530

約数の個数: 16

約数和(自身を含む): 26557440

約数和(自身を除く): 4947733

約数列:

[1, 7, 19, 47, 133, 329, 893, 3457, 6251, 24199, 65683, 162479, 459781, 1137353, 3087101, 21609707]

約数ペア:

[(1, 21609707), (7, 3087101), (19, 1137353), (47, 459781), (133, 162479), (329, 65683), (893, 24199), (3457, 6251)]