20981030

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{1553}}^1$

素因数の和:1760

約数の個数: 32

約数和(自身を含む): 43412544

約数和(自身を除く): 22431514

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 193, 386, 965, 1351, 1553, 1930, 2702, 3106, 6755, 7765, 10871, 13510, 15530, 21742, 54355, 108710, 299729, 599458, 1498645, 2098103, 2997290, 4196206, 10490515, 20981030]

約数ペア:

[(1, 20981030), (2, 10490515), (5, 4196206), (7, 2997290), (10, 2098103), (14, 1498645), (35, 599458), (70, 299729), (193, 108710), (386, 54355), (965, 21742), (1351, 15530), (1553, 13510), (1930, 10871), (2702, 7765), (3106, 6755)]