20805519

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12541}}^1$

素因数の和:12630

約数の個数: 16

約数和(自身を含む): 32107520

約数和(自身を除く): 11302001

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12541, 37623, 87787, 263361, 990739, 2972217, 6935173, 20805519]

約数ペア:

[(1, 20805519), (3, 6935173), (7, 2972217), (21, 990739), (79, 263361), (237, 87787), (553, 37623), (1659, 12541)]