19967380

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2441}}^1$

素因数の和:2859

約数の個数: 24

約数和(自身を含む): 42051240

約数和(自身を除く): 22083860

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2441, 4090, 4882, 8180, 9764, 12205, 24410, 48820, 998369, 1996738, 3993476, 4991845, 9983690, 19967380]

約数ペア:

[(1, 19967380), (2, 9983690), (4, 4991845), (5, 3993476), (10, 1996738), (20, 998369), (409, 48820), (818, 24410), (1636, 12205), (2045, 9764), (2441, 8180), (4090, 4882)]