20204320

素因数分解:

$2^5\times 5^1\times {\mathrm{197}}^1\times {\mathrm{641}}^1$

素因数の和:853

約数の個数: 48

約数和(自身を含む): 48049848

約数和(自身を除く): 27845528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 197, 394, 641, 788, 985, 1282, 1576, 1970, 2564, 3152, 3205, 3940, 5128, 6304, 6410, 7880, 10256, 12820, 15760, 20512, 25640, 31520, 51280, 102560, 126277, 252554, 505108, 631385, 1010216, 1262770, 2020432, 2525540, 4040864, 5051080, 10102160, 20204320]

約数ペア:

[(1, 20204320), (2, 10102160), (4, 5051080), (5, 4040864), (8, 2525540), (10, 2020432), (16, 1262770), (20, 1010216), (32, 631385), (40, 505108), (80, 252554), (160, 126277), (197, 102560), (394, 51280), (641, 31520), (788, 25640), (985, 20512), (1282, 15760), (1576, 12820), (1970, 10256), (2564, 7880), (3152, 6410), (3205, 6304), (3940, 5128)]