18670820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{691}}^1$

素因数の和:900

約数の個数: 48

約数和(自身を含む): 45107328

約数和(自身を除く): 26436508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 193, 386, 691, 772, 965, 1351, 1382, 1930, 2702, 2764, 3455, 3860, 4837, 5404, 6755, 6910, 9674, 13510, 13820, 19348, 24185, 27020, 48370, 96740, 133363, 266726, 533452, 666815, 933541, 1333630, 1867082, 2667260, 3734164, 4667705, 9335410, 18670820]

約数ペア:

[(1, 18670820), (2, 9335410), (4, 4667705), (5, 3734164), (7, 2667260), (10, 1867082), (14, 1333630), (20, 933541), (28, 666815), (35, 533452), (70, 266726), (140, 133363), (193, 96740), (386, 48370), (691, 27020), (772, 24185), (965, 19348), (1351, 13820), (1382, 13510), (1930, 9674), (2702, 6910), (2764, 6755), (3455, 5404), (3860, 4837)]