20801090

素因数分解:

$2^1\times 5^1\times {\mathrm{991}}^1\times {\mathrm{2099}}^1$

素因数の和:3097

約数の個数: 16

約数和(自身を含む): 37497600

約数和(自身を除く): 16696510

約数列:

[1, 2, 5, 10, 991, 1982, 2099, 4198, 4955, 9910, 10495, 20990, 2080109, 4160218, 10400545, 20801090]

約数ペア:

[(1, 20801090), (2, 10400545), (5, 4160218), (10, 2080109), (991, 20990), (1982, 10495), (2099, 9910), (4198, 4955)]