20781270

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{233}}^1\times {\mathrm{991}}^1$

素因数の和:1237

約数の個数: 48

約数和(自身を含む): 54317952

約数和(自身を除く): 33536682

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 233, 466, 699, 991, 1165, 1398, 1982, 2097, 2330, 2973, 3495, 4194, 4955, 5946, 6990, 8919, 9910, 10485, 14865, 17838, 20970, 29730, 44595, 89190, 230903, 461806, 692709, 1154515, 1385418, 2078127, 2309030, 3463545, 4156254, 6927090, 10390635, 20781270]

約数ペア:

[(1, 20781270), (2, 10390635), (3, 6927090), (5, 4156254), (6, 3463545), (9, 2309030), (10, 2078127), (15, 1385418), (18, 1154515), (30, 692709), (45, 461806), (90, 230903), (233, 89190), (466, 44595), (699, 29730), (991, 20970), (1165, 17838), (1398, 14865), (1982, 10485), (2097, 9910), (2330, 8919), (2973, 6990), (3495, 5946), (4194, 4955)]