21400001

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1\times {\mathrm{443}}^1$

素因数の和:620

約数の個数: 16

約数和(自身を含む): 25119744

約数和(自身を除く): 3719743

約数列:

[1, 7, 67, 103, 443, 469, 721, 3101, 6901, 29681, 45629, 48307, 207767, 319403, 3057143, 21400001]

約数ペア:

[(1, 21400001), (7, 3057143), (67, 319403), (103, 207767), (443, 48307), (469, 45629), (721, 29681), (3101, 6901)]