18138920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{823}}^1$

素因数の和:882

約数の個数: 64

約数和(自身を含む): 44496000

約数和(自身を除く): 26357080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 38, 40, 58, 76, 95, 116, 145, 152, 190, 232, 290, 380, 551, 580, 760, 823, 1102, 1160, 1646, 2204, 2755, 3292, 4115, 4408, 5510, 6584, 8230, 11020, 15637, 16460, 22040, 23867, 31274, 32920, 47734, 62548, 78185, 95468, 119335, 125096, 156370, 190936, 238670, 312740, 453473, 477340, 625480, 906946, 954680, 1813892, 2267365, 3627784, 4534730, 9069460, 18138920]

約数ペア:

[(1, 18138920), (2, 9069460), (4, 4534730), (5, 3627784), (8, 2267365), (10, 1813892), (19, 954680), (20, 906946), (29, 625480), (38, 477340), (40, 453473), (58, 312740), (76, 238670), (95, 190936), (116, 156370), (145, 125096), (152, 119335), (190, 95468), (232, 78185), (290, 62548), (380, 47734), (551, 32920), (580, 31274), (760, 23867), (823, 22040), (1102, 16460), (1160, 15637), (1646, 11020), (2204, 8230), (2755, 6584), (3292, 5510), (4115, 4408)]