20707540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{701}}^1$

素因数の和:928

約数の個数: 48

約数和(自身を含む): 50004864

約数和(自身を除く): 29297324

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 701, 844, 1055, 1402, 1477, 2110, 2804, 2954, 3505, 4220, 4907, 5908, 7010, 7385, 9814, 14020, 14770, 19628, 24535, 29540, 49070, 98140, 147911, 295822, 591644, 739555, 1035377, 1479110, 2070754, 2958220, 4141508, 5176885, 10353770, 20707540]

約数ペア:

[(1, 20707540), (2, 10353770), (4, 5176885), (5, 4141508), (7, 2958220), (10, 2070754), (14, 1479110), (20, 1035377), (28, 739555), (35, 591644), (70, 295822), (140, 147911), (211, 98140), (422, 49070), (701, 29540), (844, 24535), (1055, 19628), (1402, 14770), (1477, 14020), (2110, 9814), (2804, 7385), (2954, 7010), (3505, 5908), (4220, 4907)]