20380120

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3719}}^1$

素因数の和:3867

約数の個数: 32

約数和(自身を含む): 46202400

約数和(自身を除く): 25822280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3719, 5480, 7438, 14876, 18595, 29752, 37190, 74380, 148760, 509503, 1019006, 2038012, 2547515, 4076024, 5095030, 10190060, 20380120]

約数ペア:

[(1, 20380120), (2, 10190060), (4, 5095030), (5, 4076024), (8, 2547515), (10, 2038012), (20, 1019006), (40, 509503), (137, 148760), (274, 74380), (548, 37190), (685, 29752), (1096, 18595), (1370, 14876), (2740, 7438), (3719, 5480)]