20178023780

素因数分解:

$2^2\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1011937}}^1$

素因数の和:1012943

約数の個数: 24

約数和(自身を含む): 42416393208

約数和(自身を除く): 22238369428

約数列:

[1, 2, 4, 5, 10, 20, 997, 1994, 3988, 4985, 9970, 19940, 1011937, 2023874, 4047748, 5059685, 10119370, 20238740, 1008901189, 2017802378, 4035604756, 5044505945, 10089011890, 20178023780]

約数ペア:

[(1, 20178023780), (2, 10089011890), (4, 5044505945), (5, 4035604756), (10, 2017802378), (20, 1008901189), (997, 20238740), (1994, 10119370), (3988, 5059685), (4985, 4047748), (9970, 2023874), (19940, 1011937)]