2051220880

素因数分解:

$2^4\times 5^1\times {\mathrm{25640261}}^1$

素因数の和:25640274

約数の個数: 20

約数和(自身を含む): 4769088732

約数和(自身を除く): 2717867852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 25640261, 51280522, 102561044, 128201305, 205122088, 256402610, 410244176, 512805220, 1025610440, 2051220880]

約数ペア:

[(1, 2051220880), (2, 1025610440), (4, 512805220), (5, 410244176), (8, 256402610), (10, 205122088), (16, 128201305), (20, 102561044), (40, 51280522), (80, 25640261)]