20509040

素因数分解:

$2^4\times 5^1\times {\mathrm{256363}}^1$

素因数の和:256376

約数の個数: 20

約数和(自身を含む): 47683704

約数和(自身を除く): 27174664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256363, 512726, 1025452, 1281815, 2050904, 2563630, 4101808, 5127260, 10254520, 20509040]

約数ペア:

[(1, 20509040), (2, 10254520), (4, 5127260), (5, 4101808), (8, 2563630), (10, 2050904), (16, 1281815), (20, 1025452), (40, 512726), (80, 256363)]