19878740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{141991}}^1$

素因数の和:142007

約数の個数: 24

約数和(自身を含む): 47709312

約数和(自身を除く): 27830572

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 141991, 283982, 567964, 709955, 993937, 1419910, 1987874, 2839820, 3975748, 4969685, 9939370, 19878740]

約数ペア:

[(1, 19878740), (2, 9939370), (4, 4969685), (5, 3975748), (7, 2839820), (10, 1987874), (14, 1419910), (20, 993937), (28, 709955), (35, 567964), (70, 283982), (140, 141991)]