81052880

素因数分解:

$2^4\times 5^1\times {\mathrm{709}}^1\times {\mathrm{1429}}^1$

素因数の和:2151

約数の個数: 40

約数和(自身を含む): 188845800

約数和(自身を除く): 107792920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 709, 1418, 1429, 2836, 2858, 3545, 5672, 5716, 7090, 7145, 11344, 11432, 14180, 14290, 22864, 28360, 28580, 56720, 57160, 114320, 1013161, 2026322, 4052644, 5065805, 8105288, 10131610, 16210576, 20263220, 40526440, 81052880]

約数ペア:

[(1, 81052880), (2, 40526440), (4, 20263220), (5, 16210576), (8, 10131610), (10, 8105288), (16, 5065805), (20, 4052644), (40, 2026322), (80, 1013161), (709, 114320), (1418, 57160), (1429, 56720), (2836, 28580), (2858, 28360), (3545, 22864), (5672, 14290), (5716, 14180), (7090, 11432), (7145, 11344)]