20805540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49537}}^1$

素因数の和:49556

約数の個数: 48

約数和(自身を含む): 66579072

約数和(自身を除く): 45773532

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, 49537, 99074, 148611, 198148, 247685, 297222, 346759, 495370, 594444, 693518, 743055, 990740, 1040277, 1387036, 1486110, 1733795, 2080554, 2972220, 3467590, 4161108, 5201385, 6935180, 10402770, 20805540]

約数ペア:

[(1, 20805540), (2, 10402770), (3, 6935180), (4, 5201385), (5, 4161108), (6, 3467590), (7, 2972220), (10, 2080554), (12, 1733795), (14, 1486110), (15, 1387036), (20, 1040277), (21, 990740), (28, 743055), (30, 693518), (35, 594444), (42, 495370), (60, 346759), (70, 297222), (84, 247685), (105, 198148), (140, 148611), (210, 99074), (420, 49537)]