20556560

素因数分解:

$2^4\times 5^1\times {\mathrm{256957}}^1$

素因数の和:256970

約数の個数: 20

約数和(自身を含む): 47794188

約数和(自身を除く): 27237628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256957, 513914, 1027828, 1284785, 2055656, 2569570, 4111312, 5139140, 10278280, 20556560]

約数ペア:

[(1, 20556560), (2, 10278280), (4, 5139140), (5, 4111312), (8, 2569570), (10, 2055656), (16, 1284785), (20, 1027828), (40, 513914), (80, 256957)]