20684517

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3803}}^1$

素因数の和:3857

約数の個数: 24

約数和(自身を含む): 32957856

約数和(自身を除く): 12273339

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3803, 5439, 11409, 26621, 79863, 140711, 186347, 422133, 559041, 984977, 2954931, 6894839, 20684517]

約数ペア:

[(1, 20684517), (3, 6894839), (7, 2954931), (21, 984977), (37, 559041), (49, 422133), (111, 186347), (147, 140711), (259, 79863), (777, 26621), (1813, 11409), (3803, 5439)]