19990960

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22717}}^1$

素因数の和:22741

約数の個数: 40

約数和(自身を含む): 50706576

約数和(自身を除く): 30715616

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22717, 45434, 90868, 113585, 181736, 227170, 249887, 363472, 454340, 499774, 908680, 999548, 1249435, 1817360, 1999096, 2498870, 3998192, 4997740, 9995480, 19990960]

約数ペア:

[(1, 19990960), (2, 9995480), (4, 4997740), (5, 3998192), (8, 2498870), (10, 1999096), (11, 1817360), (16, 1249435), (20, 999548), (22, 908680), (40, 499774), (44, 454340), (55, 363472), (80, 249887), (88, 227170), (110, 181736), (176, 113585), (220, 90868), (440, 45434), (880, 22717)]