81275760

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{719}}^1$

素因数の和:895

約数の個数: 120

約数和(自身を含む): 275071680

約数和(自身を除く): 193795920

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 157, 180, 240, 314, 360, 471, 628, 719, 720, 785, 942, 1256, 1413, 1438, 1570, 1884, 2157, 2355, 2512, 2826, 2876, 3140, 3595, 3768, 4314, 4710, 5652, 5752, 6280, 6471, 7065, 7190, 7536, 8628, 9420, 10785, 11304, 11504, 12560, 12942, 14130, 14380, 17256, 18840, 21570, 22608, 25884, 28260, 28760, 32355, 34512, 37680, 43140, 51768, 56520, 57520, 64710, 86280, 103536, 112883, 113040, 129420, 172560, 225766, 258840, 338649, 451532, 517680, 564415, 677298, 903064, 1015947, 1128830, 1354596, 1693245, 1806128, 2031894, 2257660, 2709192, 3386490, 4063788, 4515320, 5079735, 5418384, 6772980, 8127576, 9030640, 10159470, 13545960, 16255152, 20318940, 27091920, 40637880, 81275760]

約数ペア:

[(1, 81275760), (2, 40637880), (3, 27091920), (4, 20318940), (5, 16255152), (6, 13545960), (8, 10159470), (9, 9030640), (10, 8127576), (12, 6772980), (15, 5418384), (16, 5079735), (18, 4515320), (20, 4063788), (24, 3386490), (30, 2709192), (36, 2257660), (40, 2031894), (45, 1806128), (48, 1693245), (60, 1354596), (72, 1128830), (80, 1015947), (90, 903064), (120, 677298), (144, 564415), (157, 517680), (180, 451532), (240, 338649), (314, 258840), (360, 225766), (471, 172560), (628, 129420), (719, 113040), (720, 112883), (785, 103536), (942, 86280), (1256, 64710), (1413, 57520), (1438, 56520), (1570, 51768), (1884, 43140), (2157, 37680), (2355, 34512), (2512, 32355), (2826, 28760), (2876, 28260), (3140, 25884), (3595, 22608), (3768, 21570), (4314, 18840), (4710, 17256), (5652, 14380), (5752, 14130), (6280, 12942), (6471, 12560), (7065, 11504), (7190, 11304), (7536, 10785), (8628, 9420)]