20804936840

素因数分解:

$2^3\times 5^1\times {\mathrm{520123421}}^1$

素因数の和:520123432

約数の個数: 16

約数和(自身を含む): 46811107980

約数和(自身を除く): 26006171140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520123421, 1040246842, 2080493684, 2600617105, 4160987368, 5201234210, 10402468420, 20804936840]

約数ペア:

[(1, 20804936840), (2, 10402468420), (4, 5201234210), (5, 4160987368), (8, 2600617105), (10, 2080493684), (20, 1040246842), (40, 520123421)]