128804560

素因数分解:

$2^4\times 5^1\times {\mathrm{1610057}}^1$

素因数の和:1610070

約数の個数: 20

約数和(自身を含む): 299470788

約数和(自身を除く): 170666228

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1610057, 3220114, 6440228, 8050285, 12880456, 16100570, 25760912, 32201140, 64402280, 128804560]

約数ペア:

[(1, 128804560), (2, 64402280), (4, 32201140), (5, 25760912), (8, 16100570), (10, 12880456), (16, 8050285), (20, 6440228), (40, 3220114), (80, 1610057)]