81726440

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{14699}}^1$

素因数の和:14849

約数の個数: 32

約数和(自身を含む): 185220000

約数和(自身を除く): 103493560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5560, 14699, 29398, 58796, 73495, 117592, 146990, 293980, 587960, 2043161, 4086322, 8172644, 10215805, 16345288, 20431610, 40863220, 81726440]

約数ペア:

[(1, 81726440), (2, 40863220), (4, 20431610), (5, 16345288), (8, 10215805), (10, 8172644), (20, 4086322), (40, 2043161), (139, 587960), (278, 293980), (556, 146990), (695, 117592), (1112, 73495), (1390, 58796), (2780, 29398), (5560, 14699)]