20820140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{937}}^1$

素因数の和:1058

約数の個数: 48

約数和(自身を含む): 48220704

約数和(自身を除く): 27400564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 937, 1010, 1111, 1874, 2020, 2222, 3748, 4444, 4685, 5555, 9370, 10307, 11110, 18740, 20614, 22220, 41228, 51535, 94637, 103070, 189274, 206140, 378548, 473185, 946370, 1041007, 1892740, 2082014, 4164028, 5205035, 10410070, 20820140]

約数ペア:

[(1, 20820140), (2, 10410070), (4, 5205035), (5, 4164028), (10, 2082014), (11, 1892740), (20, 1041007), (22, 946370), (44, 473185), (55, 378548), (101, 206140), (110, 189274), (202, 103070), (220, 94637), (404, 51535), (505, 41228), (937, 22220), (1010, 20614), (1111, 18740), (1874, 11110), (2020, 10307), (2222, 9370), (3748, 5555), (4444, 4685)]