20981592968

素因数分解:

$2^3\times 7^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1\times {\mathrm{40231}}^1$

素因数の和:40450

約数の個数: 64

約数和(自身を含む): 45961036800

約数和(自身を除く): 24979443832

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 67, 134, 139, 268, 278, 469, 536, 556, 938, 973, 1112, 1876, 1946, 3752, 3892, 7784, 9313, 18626, 37252, 40231, 65191, 74504, 80462, 130382, 160924, 260764, 281617, 321848, 521528, 563234, 1126468, 2252936, 2695477, 5390954, 5592109, 10781908, 11184218, 18868339, 21563816, 22368436, 37736678, 39144763, 44736872, 75473356, 78289526, 150946712, 156579052, 313158104, 374671303, 749342606, 1498685212, 2622699121, 2997370424, 5245398242, 10490796484, 20981592968]

約数ペア:

[(1, 20981592968), (2, 10490796484), (4, 5245398242), (7, 2997370424), (8, 2622699121), (14, 1498685212), (28, 749342606), (56, 374671303), (67, 313158104), (134, 156579052), (139, 150946712), (268, 78289526), (278, 75473356), (469, 44736872), (536, 39144763), (556, 37736678), (938, 22368436), (973, 21563816), (1112, 18868339), (1876, 11184218), (1946, 10781908), (3752, 5592109), (3892, 5390954), (7784, 2695477), (9313, 2252936), (18626, 1126468), (37252, 563234), (40231, 521528), (65191, 321848), (74504, 281617), (80462, 260764), (130382, 160924)]