21057805

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{739}}^1$

素因数の和:924

約数の個数: 16

約数和(自身を含む): 26107200

約数和(自身を除く): 5049395

約数列:

[1, 5, 41, 139, 205, 695, 739, 3695, 5699, 28495, 30299, 102721, 151495, 513605, 4211561, 21057805]

約数ペア:

[(1, 21057805), (5, 4211561), (41, 513605), (139, 151495), (205, 102721), (695, 30299), (739, 28495), (3695, 5699)]