20991726

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{166601}}^1$

素因数の和:166616

約数の個数: 24

約数和(自身を含む): 51979824

約数和(自身を除く): 30988098

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 166601, 333202, 499803, 999606, 1166207, 1499409, 2332414, 2998818, 3498621, 6997242, 10495863, 20991726]

約数ペア:

[(1, 20991726), (2, 10495863), (3, 6997242), (6, 3498621), (7, 2998818), (9, 2332414), (14, 1499409), (18, 1166207), (21, 999606), (42, 499803), (63, 333202), (126, 166601)]