20903181

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{7549}}^1$

素因数の和:7636

約数の個数: 16

約数和(自身を含む): 30441600

約数和(自身を除く): 9538419

約数列:

[1, 3, 13, 39, 71, 213, 923, 2769, 7549, 22647, 98137, 294411, 535979, 1607937, 6967727, 20903181]

約数ペア:

[(1, 20903181), (3, 6967727), (13, 1607937), (39, 535979), (71, 294411), (213, 98137), (923, 22647), (2769, 7549)]