320021720

素因数分解:

$2^3\times 5^1\times {\mathrm{8000543}}^1$

素因数の和:8000554

約数の個数: 16

約数和(自身を含む): 720048960

約数和(自身を除く): 400027240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 8000543, 16001086, 32002172, 40002715, 64004344, 80005430, 160010860, 320021720]

約数ペア:

[(1, 320021720), (2, 160010860), (4, 80005430), (5, 64004344), (8, 40002715), (10, 32002172), (20, 16001086), (40, 8000543)]