81131080

素因数分解:

$2^3\times 5^1\times {\mathrm{2028277}}^1$

素因数の和:2028288

約数の個数: 16

約数和(自身を含む): 182545020

約数和(自身を除く): 101413940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2028277, 4056554, 8113108, 10141385, 16226216, 20282770, 40565540, 81131080]

約数ペア:

[(1, 81131080), (2, 40565540), (4, 20282770), (5, 16226216), (8, 10141385), (10, 8113108), (20, 4056554), (40, 2028277)]