21274085

素因数分解:

$5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1223}}^1$

素因数の和:1313

約数の個数: 24

約数和(自身を含む): 30139776

約数和(自身を除く): 8865691

約数列:

[1, 5, 7, 35, 49, 71, 245, 355, 497, 1223, 2485, 3479, 6115, 8561, 17395, 42805, 59927, 86833, 299635, 434165, 607831, 3039155, 4254817, 21274085]

約数ペア:

[(1, 21274085), (5, 4254817), (7, 3039155), (35, 607831), (49, 434165), (71, 299635), (245, 86833), (355, 59927), (497, 42805), (1223, 17395), (2485, 8561), (3479, 6115)]