19990630

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{263}}^1\times {\mathrm{691}}^1$

素因数の和:972

約数の個数: 32

約数和(自身を含む): 39460608

約数和(自身を除く): 19469978

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 263, 526, 691, 1315, 1382, 2630, 2893, 3455, 5786, 6910, 7601, 14465, 15202, 28930, 38005, 76010, 181733, 363466, 908665, 1817330, 1999063, 3998126, 9995315, 19990630]

約数ペア:

[(1, 19990630), (2, 9995315), (5, 3998126), (10, 1999063), (11, 1817330), (22, 908665), (55, 363466), (110, 181733), (263, 76010), (526, 38005), (691, 28930), (1315, 15202), (1382, 14465), (2630, 7601), (2893, 6910), (3455, 5786)]