201639820

素因数分解:

$2^2\times 5^1\times {\mathrm{10081991}}^1$

素因数の和:10082000

約数の個数: 12

約数和(自身を含む): 423443664

約数和(自身を除く): 221803844

約数列:

[1, 2, 4, 5, 10, 20, 10081991, 20163982, 40327964, 50409955, 100819910, 201639820]

約数ペア:

[(1, 201639820), (2, 100819910), (4, 50409955), (5, 40327964), (10, 20163982), (20, 10081991)]