21779780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{98999}}^1$

素因数の和:99019

約数の個数: 24

約数和(自身を含む): 49896000

約数和(自身を除く): 28116220

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 98999, 197998, 395996, 494995, 989990, 1088989, 1979980, 2177978, 4355956, 5444945, 10889890, 21779780]

約数ペア:

[(1, 21779780), (2, 10889890), (4, 5444945), (5, 4355956), (10, 2177978), (11, 1979980), (20, 1088989), (22, 989990), (44, 494995), (55, 395996), (110, 197998), (220, 98999)]