20886980

素因数分解:

$2^2\times 5^1\times {\mathrm{787}}^1\times {\mathrm{1327}}^1$

素因数の和:2123

約数の個数: 24

約数和(自身を含む): 43951488

約数和(自身を除く): 23064508

約数列:

[1, 2, 4, 5, 10, 20, 787, 1327, 1574, 2654, 3148, 3935, 5308, 6635, 7870, 13270, 15740, 26540, 1044349, 2088698, 4177396, 5221745, 10443490, 20886980]

約数ペア:

[(1, 20886980), (2, 10443490), (4, 5221745), (5, 4177396), (10, 2088698), (20, 1044349), (787, 26540), (1327, 15740), (1574, 13270), (2654, 7870), (3148, 6635), (3935, 5308)]