21965480

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5437}}^1$

素因数の和:5549

約数の個数: 32

約数和(自身を含む): 49920840

約数和(自身を除く): 27955360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5437, 10874, 21748, 27185, 43496, 54370, 108740, 217480, 549137, 1098274, 2196548, 2745685, 4393096, 5491370, 10982740, 21965480]

約数ペア:

[(1, 21965480), (2, 10982740), (4, 5491370), (5, 4393096), (8, 2745685), (10, 2196548), (20, 1098274), (40, 549137), (101, 217480), (202, 108740), (404, 54370), (505, 43496), (808, 27185), (1010, 21748), (2020, 10874), (4040, 5437)]