18828020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{22961}}^1$

素因数の和:23011

約数の個数: 24

約数和(自身を含む): 40504968

約数和(自身を除く): 21676948

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 22961, 45922, 91844, 114805, 229610, 459220, 941401, 1882802, 3765604, 4707005, 9414010, 18828020]

約数ペア:

[(1, 18828020), (2, 9414010), (4, 4707005), (5, 3765604), (10, 1882802), (20, 941401), (41, 459220), (82, 229610), (164, 114805), (205, 91844), (410, 45922), (820, 22961)]