80621720

素因数分解:

$2^3\times 5^1\times {\mathrm{2015543}}^1$

素因数の和:2015554

約数の個数: 16

約数和(自身を含む): 181398960

約数和(自身を除く): 100777240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2015543, 4031086, 8062172, 10077715, 16124344, 20155430, 40310860, 80621720]

約数ペア:

[(1, 80621720), (2, 40310860), (4, 20155430), (5, 16124344), (8, 10077715), (10, 8062172), (20, 4031086), (40, 2015543)]