18611405

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:644

約数の個数: 16

約数和(自身を含む): 22915200

約数和(自身を除く): 4303795

約数列:

[1, 5, 61, 139, 305, 439, 695, 2195, 8479, 26779, 42395, 61021, 133895, 305105, 3722281, 18611405]

約数ペア:

[(1, 18611405), (5, 3722281), (61, 305105), (139, 133895), (305, 61021), (439, 42395), (695, 26779), (2195, 8479)]