20981884

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^3\times {\mathrm{563}}^1$

素因数の和:607

約数の個数: 48

約数和(自身を含む): 46238976

約数和(自身を除く): 25257092

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 121, 154, 242, 308, 484, 563, 847, 1126, 1331, 1694, 2252, 2662, 3388, 3941, 5324, 6193, 7882, 9317, 12386, 15764, 18634, 24772, 37268, 43351, 68123, 86702, 136246, 173404, 272492, 476861, 749353, 953722, 1498706, 1907444, 2997412, 5245471, 10490942, 20981884]

約数ペア:

[(1, 20981884), (2, 10490942), (4, 5245471), (7, 2997412), (11, 1907444), (14, 1498706), (22, 953722), (28, 749353), (44, 476861), (77, 272492), (121, 173404), (154, 136246), (242, 86702), (308, 68123), (484, 43351), (563, 37268), (847, 24772), (1126, 18634), (1331, 15764), (1694, 12386), (2252, 9317), (2662, 7882), (3388, 6193), (3941, 5324)]