21000751947

素因数分解:

$3^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1021}}^1\times {\mathrm{2003}}^1$

素因数の和:3200

約数の個数: 48

約数和(自身を含む): 34932188928

約数和(自身を除く): 13931436981

約数列:

[1, 3, 7, 9, 21, 63, 163, 489, 1021, 1141, 1467, 2003, 3063, 3423, 6009, 7147, 9189, 10269, 14021, 18027, 21441, 42063, 64323, 126189, 166423, 326489, 499269, 979467, 1164961, 1497807, 2045063, 2285423, 2938401, 3494883, 6135189, 6856269, 10484649, 14315441, 18405567, 20568807, 42946323, 128838969, 333345269, 1000035807, 2333416883, 3000107421, 7000250649, 21000751947]

約数ペア:

[(1, 21000751947), (3, 7000250649), (7, 3000107421), (9, 2333416883), (21, 1000035807), (63, 333345269), (163, 128838969), (489, 42946323), (1021, 20568807), (1141, 18405567), (1467, 14315441), (2003, 10484649), (3063, 6856269), (3423, 6135189), (6009, 3494883), (7147, 2938401), (9189, 2285423), (10269, 2045063), (14021, 1497807), (18027, 1164961), (21441, 979467), (42063, 499269), (64323, 326489), (126189, 166423)]