19816880

素因数分解:

$2^4\times 5^1\times {\mathrm{247711}}^1$

素因数の和:247724

約数の個数: 20

約数和(自身を含む): 46074432

約数和(自身を除く): 26257552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247711, 495422, 990844, 1238555, 1981688, 2477110, 3963376, 4954220, 9908440, 19816880]

約数ペア:

[(1, 19816880), (2, 9908440), (4, 4954220), (5, 3963376), (8, 2477110), (10, 1981688), (16, 1238555), (20, 990844), (40, 495422), (80, 247711)]