17991963

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 30191616

約数和(自身を除く): 12199653

約数列:

[1, 3, 9, 11, 27, 33, 53, 81, 99, 127, 159, 243, 297, 381, 477, 583, 891, 1143, 1397, 1431, 1749, 2673, 3429, 4191, 4293, 5247, 6731, 10287, 12573, 12879, 15741, 20193, 30861, 37719, 47223, 60579, 74041, 113157, 141669, 181737, 222123, 339471, 545211, 666369, 1635633, 1999107, 5997321, 17991963]

約数ペア:

[(1, 17991963), (3, 5997321), (9, 1999107), (11, 1635633), (27, 666369), (33, 545211), (53, 339471), (81, 222123), (99, 181737), (127, 141669), (159, 113157), (243, 74041), (297, 60579), (381, 47223), (477, 37719), (583, 30861), (891, 20193), (1143, 15741), (1397, 12879), (1431, 12573), (1749, 10287), (2673, 6731), (3429, 5247), (4191, 4293)]