20641520

素因数分解:

$2^4\times 5^1\times {\mathrm{258019}}^1$

素因数の和:258032

約数の個数: 20

約数和(自身を含む): 47991720

約数和(自身を除く): 27350200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258019, 516038, 1032076, 1290095, 2064152, 2580190, 4128304, 5160380, 10320760, 20641520]

約数ペア:

[(1, 20641520), (2, 10320760), (4, 5160380), (5, 4128304), (8, 2580190), (10, 2064152), (16, 1290095), (20, 1032076), (40, 516038), (80, 258019)]