81611240

素因数分解:

$2^3\times 5^1\times {\mathrm{2040281}}^1$

素因数の和:2040292

約数の個数: 16

約数和(自身を含む): 183625380

約数和(自身を除く): 102014140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040281, 4080562, 8161124, 10201405, 16322248, 20402810, 40805620, 81611240]

約数ペア:

[(1, 81611240), (2, 40805620), (4, 20402810), (5, 16322248), (8, 10201405), (10, 8161124), (20, 4080562), (40, 2040281)]