20705040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{193}}^1$

素因数の和:361

約数の個数: 120

約数和(自身を含む): 70363800

約数和(自身を除く): 49658760

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, 149, 180, 193, 240, 298, 360, 386, 447, 579, 596, 720, 745, 772, 894, 965, 1158, 1192, 1341, 1490, 1544, 1737, 1788, 1930, 2235, 2316, 2384, 2682, 2895, 2980, 3088, 3474, 3576, 3860, 4470, 4632, 5364, 5790, 5960, 6705, 6948, 7152, 7720, 8685, 8940, 9264, 10728, 11580, 11920, 13410, 13896, 15440, 17370, 17880, 21456, 23160, 26820, 27792, 28757, 34740, 35760, 46320, 53640, 57514, 69480, 86271, 107280, 115028, 138960, 143785, 172542, 230056, 258813, 287570, 345084, 431355, 460112, 517626, 575140, 690168, 862710, 1035252, 1150280, 1294065, 1380336, 1725420, 2070504, 2300560, 2588130, 3450840, 4141008, 5176260, 6901680, 10352520, 20705040]

約数ペア:

[(1, 20705040), (2, 10352520), (3, 6901680), (4, 5176260), (5, 4141008), (6, 3450840), (8, 2588130), (9, 2300560), (10, 2070504), (12, 1725420), (15, 1380336), (16, 1294065), (18, 1150280), (20, 1035252), (24, 862710), (30, 690168), (36, 575140), (40, 517626), (45, 460112), (48, 431355), (60, 345084), (72, 287570), (80, 258813), (90, 230056), (120, 172542), (144, 143785), (149, 138960), (180, 115028), (193, 107280), (240, 86271), (298, 69480), (360, 57514), (386, 53640), (447, 46320), (579, 35760), (596, 34740), (720, 28757), (745, 27792), (772, 26820), (894, 23160), (965, 21456), (1158, 17880), (1192, 17370), (1341, 15440), (1490, 13896), (1544, 13410), (1737, 11920), (1788, 11580), (1930, 10728), (2235, 9264), (2316, 8940), (2384, 8685), (2682, 7720), (2895, 7152), (2980, 6948), (3088, 6705), (3474, 5960), (3576, 5790), (3860, 5364), (4470, 4632)]