20504560

素因数分解:

$2^4\times 5^1\times {\mathrm{256307}}^1$

素因数の和:256320

約数の個数: 20

約数和(自身を含む): 47673288

約数和(自身を除く): 27168728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256307, 512614, 1025228, 1281535, 2050456, 2563070, 4100912, 5126140, 10252280, 20504560]

約数ペア:

[(1, 20504560), (2, 10252280), (4, 5126140), (5, 4100912), (8, 2563070), (10, 2050456), (16, 1281535), (20, 1025228), (40, 512614), (80, 256307)]