21122360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75437}}^1$

素因数の和:75455

約数の個数: 32

約数和(自身を含む): 54315360

約数和(自身を除く): 33193000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75437, 150874, 301748, 377185, 528059, 603496, 754370, 1056118, 1508740, 2112236, 2640295, 3017480, 4224472, 5280590, 10561180, 21122360]

約数ペア:

[(1, 21122360), (2, 10561180), (4, 5280590), (5, 4224472), (7, 3017480), (8, 2640295), (10, 2112236), (14, 1508740), (20, 1056118), (28, 754370), (35, 603496), (40, 528059), (56, 377185), (70, 301748), (140, 150874), (280, 75437)]