28005520

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1777}}^1$

素因数の和:1987

約数の個数: 40

約数和(自身を含む): 65480184

約数和(自身を除く): 37474664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1777, 1970, 3152, 3554, 3940, 7108, 7880, 8885, 14216, 15760, 17770, 28432, 35540, 71080, 142160, 350069, 700138, 1400276, 1750345, 2800552, 3500690, 5601104, 7001380, 14002760, 28005520]

約数ペア:

[(1, 28005520), (2, 14002760), (4, 7001380), (5, 5601104), (8, 3500690), (10, 2800552), (16, 1750345), (20, 1400276), (40, 700138), (80, 350069), (197, 142160), (394, 71080), (788, 35540), (985, 28432), (1576, 17770), (1777, 15760), (1970, 14216), (3152, 8885), (3554, 7880), (3940, 7108)]