20684720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{859}}^1$

素因数の和:922

約数の個数: 80

約数和(自身を含む): 56305920

約数和(自身を除く): 35621200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 43, 56, 70, 80, 86, 112, 140, 172, 215, 280, 301, 344, 430, 560, 602, 688, 859, 860, 1204, 1505, 1718, 1720, 2408, 3010, 3436, 3440, 4295, 4816, 6013, 6020, 6872, 8590, 12026, 12040, 13744, 17180, 24052, 24080, 30065, 34360, 36937, 48104, 60130, 68720, 73874, 96208, 120260, 147748, 184685, 240520, 258559, 295496, 369370, 481040, 517118, 590992, 738740, 1034236, 1292795, 1477480, 2068472, 2585590, 2954960, 4136944, 5171180, 10342360, 20684720]

約数ペア:

[(1, 20684720), (2, 10342360), (4, 5171180), (5, 4136944), (7, 2954960), (8, 2585590), (10, 2068472), (14, 1477480), (16, 1292795), (20, 1034236), (28, 738740), (35, 590992), (40, 517118), (43, 481040), (56, 369370), (70, 295496), (80, 258559), (86, 240520), (112, 184685), (140, 147748), (172, 120260), (215, 96208), (280, 73874), (301, 68720), (344, 60130), (430, 48104), (560, 36937), (602, 34360), (688, 30065), (859, 24080), (860, 24052), (1204, 17180), (1505, 13744), (1718, 12040), (1720, 12026), (2408, 8590), (3010, 6872), (3436, 6020), (3440, 6013), (4295, 4816)]