19495120

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1237}}^1$

素因数の和:1447

約数の個数: 40

約数和(自身を含む): 45593064

約数和(自身を除く): 26097944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1237, 1576, 1970, 2474, 3152, 3940, 4948, 6185, 7880, 9896, 12370, 15760, 19792, 24740, 49480, 98960, 243689, 487378, 974756, 1218445, 1949512, 2436890, 3899024, 4873780, 9747560, 19495120]

約数ペア:

[(1, 19495120), (2, 9747560), (4, 4873780), (5, 3899024), (8, 2436890), (10, 1949512), (16, 1218445), (20, 974756), (40, 487378), (80, 243689), (197, 98960), (394, 49480), (788, 24740), (985, 19792), (1237, 15760), (1576, 12370), (1970, 9896), (2474, 7880), (3152, 6185), (3940, 4948)]