19575820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{881}}^1$

素因数の和:1002

約数の個数: 48

約数和(自身を含む): 45341856

約数和(自身を除く): 25766036

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 881, 1010, 1111, 1762, 2020, 2222, 3524, 4405, 4444, 5555, 8810, 9691, 11110, 17620, 19382, 22220, 38764, 48455, 88981, 96910, 177962, 193820, 355924, 444905, 889810, 978791, 1779620, 1957582, 3915164, 4893955, 9787910, 19575820]

約数ペア:

[(1, 19575820), (2, 9787910), (4, 4893955), (5, 3915164), (10, 1957582), (11, 1779620), (20, 978791), (22, 889810), (44, 444905), (55, 355924), (101, 193820), (110, 177962), (202, 96910), (220, 88981), (404, 48455), (505, 38764), (881, 22220), (1010, 19382), (1111, 17620), (1762, 11110), (2020, 9691), (2222, 8810), (3524, 5555), (4405, 4444)]