20640840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{823}}^1$

素因数の和:867

約数の個数: 128

約数和(自身を含む): 71193600

約数和(自身を除く): 50552760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 19, 20, 22, 24, 30, 33, 38, 40, 44, 55, 57, 60, 66, 76, 88, 95, 110, 114, 120, 132, 152, 165, 190, 209, 220, 228, 264, 285, 330, 380, 418, 440, 456, 570, 627, 660, 760, 823, 836, 1045, 1140, 1254, 1320, 1646, 1672, 2090, 2280, 2469, 2508, 3135, 3292, 4115, 4180, 4938, 5016, 6270, 6584, 8230, 8360, 9053, 9876, 12345, 12540, 15637, 16460, 18106, 19752, 24690, 25080, 27159, 31274, 32920, 36212, 45265, 46911, 49380, 54318, 62548, 72424, 78185, 90530, 93822, 98760, 108636, 125096, 135795, 156370, 172007, 181060, 187644, 217272, 234555, 271590, 312740, 344014, 362120, 375288, 469110, 516021, 543180, 625480, 688028, 860035, 938220, 1032042, 1086360, 1376056, 1720070, 1876440, 2064084, 2580105, 3440140, 4128168, 5160210, 6880280, 10320420, 20640840]

約数ペア:

[(1, 20640840), (2, 10320420), (3, 6880280), (4, 5160210), (5, 4128168), (6, 3440140), (8, 2580105), (10, 2064084), (11, 1876440), (12, 1720070), (15, 1376056), (19, 1086360), (20, 1032042), (22, 938220), (24, 860035), (30, 688028), (33, 625480), (38, 543180), (40, 516021), (44, 469110), (55, 375288), (57, 362120), (60, 344014), (66, 312740), (76, 271590), (88, 234555), (95, 217272), (110, 187644), (114, 181060), (120, 172007), (132, 156370), (152, 135795), (165, 125096), (190, 108636), (209, 98760), (220, 93822), (228, 90530), (264, 78185), (285, 72424), (330, 62548), (380, 54318), (418, 49380), (440, 46911), (456, 45265), (570, 36212), (627, 32920), (660, 31274), (760, 27159), (823, 25080), (836, 24690), (1045, 19752), (1140, 18106), (1254, 16460), (1320, 15637), (1646, 12540), (1672, 12345), (2090, 9876), (2280, 9053), (2469, 8360), (2508, 8230), (3135, 6584), (3292, 6270), (4115, 5016), (4180, 4938)]