399700007

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{189701}}^1$

素因数の和:189758

約数の個数: 12

約数和(自身を含む): 475772616

約数和(自身を除く): 76072609

約数列:

[1, 7, 43, 49, 301, 2107, 189701, 1327907, 8157143, 9295349, 57100001, 399700007]

約数ペア:

[(1, 399700007), (7, 57100001), (43, 9295349), (49, 8157143), (301, 1327907), (2107, 189701)]