20648640

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:314

約数の個数: 112

約数和(自身を含む): 66458592

約数和(自身を除く): 45809952

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 137, 157, 160, 192, 240, 274, 314, 320, 411, 471, 480, 548, 628, 685, 785, 822, 942, 960, 1096, 1256, 1370, 1570, 1644, 1884, 2055, 2192, 2355, 2512, 2740, 3140, 3288, 3768, 4110, 4384, 4710, 5024, 5480, 6280, 6576, 7536, 8220, 8768, 9420, 10048, 10960, 12560, 13152, 15072, 16440, 18840, 21509, 21920, 25120, 26304, 30144, 32880, 37680, 43018, 43840, 50240, 64527, 65760, 75360, 86036, 107545, 129054, 131520, 150720, 172072, 215090, 258108, 322635, 344144, 430180, 516216, 645270, 688288, 860360, 1032432, 1290540, 1376576, 1720720, 2064864, 2581080, 3441440, 4129728, 5162160, 6882880, 10324320, 20648640]

約数ペア:

[(1, 20648640), (2, 10324320), (3, 6882880), (4, 5162160), (5, 4129728), (6, 3441440), (8, 2581080), (10, 2064864), (12, 1720720), (15, 1376576), (16, 1290540), (20, 1032432), (24, 860360), (30, 688288), (32, 645270), (40, 516216), (48, 430180), (60, 344144), (64, 322635), (80, 258108), (96, 215090), (120, 172072), (137, 150720), (157, 131520), (160, 129054), (192, 107545), (240, 86036), (274, 75360), (314, 65760), (320, 64527), (411, 50240), (471, 43840), (480, 43018), (548, 37680), (628, 32880), (685, 30144), (785, 26304), (822, 25120), (942, 21920), (960, 21509), (1096, 18840), (1256, 16440), (1370, 15072), (1570, 13152), (1644, 12560), (1884, 10960), (2055, 10048), (2192, 9420), (2355, 8768), (2512, 8220), (2740, 7536), (3140, 6576), (3288, 6280), (3768, 5480), (4110, 5024), (4384, 4710)]