20802180021

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{13951831}}^1$

素因数の和:13951912

約数の個数: 16

約数和(自身を含む): 32145020928

約数和(自身を除く): 11342840907

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 13951831, 41855493, 97662817, 292988451, 990580001, 2971740003, 6934060007, 20802180021]

約数ペア:

[(1, 20802180021), (3, 6934060007), (7, 2971740003), (21, 990580001), (71, 292988451), (213, 97662817), (497, 41855493), (1491, 13951831)]