128204080

素因数分解:

$2^4\times 5^1\times {\mathrm{1602551}}^1$

素因数の和:1602564

約数の個数: 20

約数和(自身を含む): 298074672

約数和(自身を除く): 169870592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1602551, 3205102, 6410204, 8012755, 12820408, 16025510, 25640816, 32051020, 64102040, 128204080]

約数ペア:

[(1, 128204080), (2, 64102040), (4, 32051020), (5, 25640816), (8, 16025510), (10, 12820408), (16, 8012755), (20, 6410204), (40, 3205102), (80, 1602551)]