439780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1999}}^1$

素因数の和:2019

約数の個数: 24

約数和(自身を含む): 1008000

約数和(自身を除く): 568220

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 1999, 3998, 7996, 9995, 19990, 21989, 39980, 43978, 87956, 109945, 219890, 439780]

約数ペア:

[(1, 439780), (2, 219890), (4, 109945), (5, 87956), (10, 43978), (11, 39980), (20, 21989), (22, 19990), (44, 9995), (55, 7996), (110, 3998), (220, 1999)]