21936740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{156691}}^1$

素因数の和:156707

約数の個数: 24

約数和(自身を含む): 52648512

約数和(自身を除く): 30711772

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 156691, 313382, 626764, 783455, 1096837, 1566910, 2193674, 3133820, 4387348, 5484185, 10968370, 21936740]

約数ペア:

[(1, 21936740), (2, 10968370), (4, 5484185), (5, 4387348), (7, 3133820), (10, 2193674), (14, 1566910), (20, 1096837), (28, 783455), (35, 626764), (70, 313382), (140, 156691)]