206220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{491}}^1$

素因数の和:510

約数の個数: 48

約数和(自身を含む): 661248

約数和(自身を除く): 455028

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, 491, 982, 1473, 1964, 2455, 2946, 3437, 4910, 5892, 6874, 7365, 9820, 10311, 13748, 14730, 17185, 20622, 29460, 34370, 41244, 51555, 68740, 103110, 206220]

約数ペア:

[(1, 206220), (2, 103110), (3, 68740), (4, 51555), (5, 41244), (6, 34370), (7, 29460), (10, 20622), (12, 17185), (14, 14730), (15, 13748), (20, 10311), (21, 9820), (28, 7365), (30, 6874), (35, 5892), (42, 4910), (60, 3437), (70, 2946), (84, 2455), (105, 1964), (140, 1473), (210, 982), (420, 491)]