128435620

素因数分解:

$2^2\times 5^1\times {\mathrm{6421781}}^1$

素因数の和:6421790

約数の個数: 12

約数和(自身を含む): 269714844

約数和(自身を除く): 141279224

約数列:

[1, 2, 4, 5, 10, 20, 6421781, 12843562, 25687124, 32108905, 64217810, 128435620]

約数ペア:

[(1, 128435620), (2, 64217810), (4, 32108905), (5, 25687124), (10, 12843562), (20, 6421781)]