21979820

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3911}}^1$

素因数の和:4201

約数の個数: 24

約数和(自身を含む): 46333728

約数和(自身を除く): 24353908

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3911, 5620, 7822, 15644, 19555, 39110, 78220, 1098991, 2197982, 4395964, 5494955, 10989910, 21979820]

約数ペア:

[(1, 21979820), (2, 10989910), (4, 5494955), (5, 4395964), (10, 2197982), (20, 1098991), (281, 78220), (562, 39110), (1124, 19555), (1405, 15644), (2810, 7822), (3911, 5620)]