20791120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{271}}^1$

素因数の和:428

約数の個数: 80

約数和(自身を含む): 55853568

約数和(自身を除く): 35062448

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 137, 140, 271, 274, 280, 542, 548, 560, 685, 959, 1084, 1096, 1355, 1370, 1897, 1918, 2168, 2192, 2710, 2740, 3794, 3836, 4336, 4795, 5420, 5480, 7588, 7672, 9485, 9590, 10840, 10960, 15176, 15344, 18970, 19180, 21680, 30352, 37127, 37940, 38360, 74254, 75880, 76720, 148508, 151760, 185635, 259889, 297016, 371270, 519778, 594032, 742540, 1039556, 1299445, 1485080, 2079112, 2598890, 2970160, 4158224, 5197780, 10395560, 20791120]

約数ペア:

[(1, 20791120), (2, 10395560), (4, 5197780), (5, 4158224), (7, 2970160), (8, 2598890), (10, 2079112), (14, 1485080), (16, 1299445), (20, 1039556), (28, 742540), (35, 594032), (40, 519778), (56, 371270), (70, 297016), (80, 259889), (112, 185635), (137, 151760), (140, 148508), (271, 76720), (274, 75880), (280, 74254), (542, 38360), (548, 37940), (560, 37127), (685, 30352), (959, 21680), (1084, 19180), (1096, 18970), (1355, 15344), (1370, 15176), (1897, 10960), (1918, 10840), (2168, 9590), (2192, 9485), (2710, 7672), (2740, 7588), (3794, 5480), (3836, 5420), (4336, 4795)]