19998740

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{8849}}^1$

素因数の和:8971

約数の個数: 24

約数和(自身を含む): 42373800

約数和(自身を除く): 22375060

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 8849, 17698, 35396, 44245, 88490, 176980, 999937, 1999874, 3999748, 4999685, 9999370, 19998740]

約数ペア:

[(1, 19998740), (2, 9999370), (4, 4999685), (5, 3999748), (10, 1999874), (20, 999937), (113, 176980), (226, 88490), (452, 44245), (565, 35396), (1130, 17698), (2260, 8849)]