20942845

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{409}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 33652800

約数和(自身を除く): 12709955

約数列:

[1, 5, 7, 11, 19, 35, 49, 55, 77, 95, 133, 209, 245, 385, 409, 539, 665, 931, 1045, 1463, 2045, 2695, 2863, 4499, 4655, 7315, 7771, 10241, 14315, 20041, 22495, 31493, 38855, 51205, 54397, 85481, 100205, 157465, 220451, 271985, 380779, 427405, 598367, 1102255, 1903895, 2991835, 4188569, 20942845]

約数ペア:

[(1, 20942845), (5, 4188569), (7, 2991835), (11, 1903895), (19, 1102255), (35, 598367), (49, 427405), (55, 380779), (77, 271985), (95, 220451), (133, 157465), (209, 100205), (245, 85481), (385, 54397), (409, 51205), (539, 38855), (665, 31493), (931, 22495), (1045, 20041), (1463, 14315), (2045, 10241), (2695, 7771), (2863, 7315), (4499, 4655)]