18966280

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3461}}^1$

素因数の和:3609

約数の個数: 32

約数和(自身を含む): 42998040

約数和(自身を除く): 24031760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3461, 5480, 6922, 13844, 17305, 27688, 34610, 69220, 138440, 474157, 948314, 1896628, 2370785, 3793256, 4741570, 9483140, 18966280]

約数ペア:

[(1, 18966280), (2, 9483140), (4, 4741570), (5, 3793256), (8, 2370785), (10, 1896628), (20, 948314), (40, 474157), (137, 138440), (274, 69220), (548, 34610), (685, 27688), (1096, 17305), (1370, 13844), (2740, 6922), (3461, 5480)]