21710220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51691}}^1$

素因数の和:51710

約数の個数: 48

約数和(自身を含む): 69474048

約数和(自身を除く): 47763828

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51691, 103382, 155073, 206764, 258455, 310146, 361837, 516910, 620292, 723674, 775365, 1033820, 1085511, 1447348, 1550730, 1809185, 2171022, 3101460, 3618370, 4342044, 5427555, 7236740, 10855110, 21710220]

約数ペア:

[(1, 21710220), (2, 10855110), (3, 7236740), (4, 5427555), (5, 4342044), (6, 3618370), (7, 3101460), (10, 2171022), (12, 1809185), (14, 1550730), (15, 1447348), (20, 1085511), (21, 1033820), (28, 775365), (30, 723674), (35, 620292), (42, 516910), (60, 361837), (70, 310146), (84, 258455), (105, 206764), (140, 155073), (210, 103382), (420, 51691)]