80705780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37021}}^1$

素因数の和:37139

約数の個数: 24

約数和(自身を含む): 171041640

約数和(自身を除く): 90335860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37021, 74042, 148084, 185105, 370210, 740420, 4035289, 8070578, 16141156, 20176445, 40352890, 80705780]

約数ペア:

[(1, 80705780), (2, 40352890), (4, 20176445), (5, 16141156), (10, 8070578), (20, 4035289), (109, 740420), (218, 370210), (436, 185105), (545, 148084), (1090, 74042), (2180, 37021)]