20353720

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2557}}^1$

素因数の和:2767

約数の個数: 32

約数和(自身を含む): 46044000

約数和(自身を除く): 25690280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 2557, 3980, 5114, 7960, 10228, 12785, 20456, 25570, 51140, 102280, 508843, 1017686, 2035372, 2544215, 4070744, 5088430, 10176860, 20353720]

約数ペア:

[(1, 20353720), (2, 10176860), (4, 5088430), (5, 4070744), (8, 2544215), (10, 2035372), (20, 1017686), (40, 508843), (199, 102280), (398, 51140), (796, 25570), (995, 20456), (1592, 12785), (1990, 10228), (2557, 7960), (3980, 5114)]